1 00:00:01,770 --> 00:00:03,510 Hey, guys, what's up? 2 00:00:04,080 --> 00:00:11,100 So today we are solving one more interesting problem, so a problem statement is I write a program. 3 00:00:12,530 --> 00:00:21,950 To reverse a number, so we have to write a program to reverse a number, so W8 being WRP means vapid 4 00:00:21,950 --> 00:00:23,200 means, right? 5 00:00:25,100 --> 00:00:25,640 Program, 6 00:00:28,700 --> 00:00:35,490 for example, of the given number is, let's say when 25, some output should be 521. 7 00:00:36,290 --> 00:00:41,180 If the given number is today for some arbitrary forty three. 8 00:00:42,520 --> 00:00:50,920 Similarly, if my input is, let's say five twenty one, some output should be one twenty five. 9 00:00:52,360 --> 00:00:57,170 If they're in four days today to my output should be 23. 10 00:00:57,370 --> 00:00:58,600 So we have to reverse. 11 00:00:58,610 --> 00:00:59,020 No. 12 00:01:00,570 --> 00:01:02,220 So how we can solve this problem? 13 00:01:03,580 --> 00:01:05,170 So the logic is very simple. 14 00:01:06,100 --> 00:01:13,620 So what we do is so what we do is, for example, let's say my value is my number is let's say 32. 15 00:01:15,010 --> 00:01:16,810 So I will find last digit. 16 00:01:18,530 --> 00:01:21,890 And more Ditton will give me the last digit, which is to. 17 00:01:23,880 --> 00:01:24,070 OK. 18 00:01:24,150 --> 00:01:32,560 And I will also maintain a number of laws, which is initially zero, and I will add to the rivers so 19 00:01:32,580 --> 00:01:34,460 rivers will become too. 20 00:01:35,790 --> 00:01:38,610 Now, I will update that number, no question number by 10. 21 00:01:38,670 --> 00:01:40,320 So my new number is three. 22 00:01:40,770 --> 00:01:42,930 Now I will again find the last digit. 23 00:01:43,470 --> 00:01:46,680 So three more then it was three. 24 00:01:47,760 --> 00:01:54,990 And now what I will do, I will write reverse equals reverse plus last digit. 25 00:01:56,460 --> 00:01:58,020 So if you will write this. 26 00:01:58,110 --> 00:01:58,920 So this is wrong. 27 00:01:59,490 --> 00:02:02,580 So in previous example where we have to find the sum of their digits. 28 00:02:03,300 --> 00:02:09,000 So we have written something like a sum equals some plus last digit. 29 00:02:12,500 --> 00:02:18,380 OK, so the idea is very similar to the last problem, but this idea will not work here because if you 30 00:02:18,740 --> 00:02:21,080 reverse is also zero, sum was also zero. 31 00:02:21,920 --> 00:02:23,600 We are again finding the last digit. 32 00:02:23,690 --> 00:02:25,310 We are dividing the number by 10. 33 00:02:25,970 --> 00:02:29,170 But if you if you will write to us, it calls it was blessed last digit. 34 00:02:29,600 --> 00:02:30,500 It will find some. 35 00:02:30,630 --> 00:02:31,310 What will happen? 36 00:02:32,000 --> 00:02:33,240 It will become reverse. 37 00:02:33,290 --> 00:02:34,520 It goes all the way live. 38 00:02:34,520 --> 00:02:34,940 Reverse. 39 00:02:35,450 --> 00:02:35,950 Blessed tree. 40 00:02:36,260 --> 00:02:37,160 It will become five. 41 00:02:39,090 --> 00:02:46,830 So what we should do, reverse it was reverse first multiply two with 10, then add three. 42 00:02:49,590 --> 00:02:52,820 So this will give me twenty three. 43 00:02:54,180 --> 00:03:03,930 So the defense's last example, I did some inkwells someplace, last blizzard here where they will do 44 00:03:04,630 --> 00:03:09,750 a reverse equals reverse, multiply by 10 plus last digit. 45 00:03:13,070 --> 00:03:17,900 This 10 is extra, this multiplication with ten is extra. 46 00:03:18,340 --> 00:03:18,640 OK. 47 00:03:19,880 --> 00:03:25,670 You can also add I did some equals, some multiplied 10 plus last digit. 48 00:03:27,730 --> 00:03:33,640 Is there a difference between the last question and this question is only this multiplication by 10 49 00:03:33,640 --> 00:03:34,060 factor? 50 00:03:35,290 --> 00:03:37,630 So let me show you how it works. 51 00:03:38,560 --> 00:03:43,240 So suppose the value of any is 32 initially made, it was really zero. 52 00:03:43,720 --> 00:03:46,080 So find the last digit, which is two. 53 00:03:46,150 --> 00:03:48,400 So last digit it close to. 54 00:03:50,390 --> 00:03:56,960 So reverse it calls reverse multiply by 10 plus last digit. 55 00:03:58,310 --> 00:03:59,750 So initially reverse is zero. 56 00:03:59,780 --> 00:04:03,400 So zero multiply where ten will be zero and last digit is too. 57 00:04:04,010 --> 00:04:05,000 So reverse is true. 58 00:04:05,300 --> 00:04:06,920 Now, I will update the number. 59 00:04:07,310 --> 00:04:08,660 So my number is three. 60 00:04:09,770 --> 00:04:10,250 How? 61 00:04:10,760 --> 00:04:12,550 Because number is divided by ten. 62 00:04:13,680 --> 00:04:14,960 Now maybe versus two. 63 00:04:15,770 --> 00:04:17,030 So it will be the last widget. 64 00:04:17,210 --> 00:04:22,170 Last digit is three and reverse equals reverse. 65 00:04:22,250 --> 00:04:24,610 Which is to multiply by ten. 66 00:04:25,280 --> 00:04:27,080 Plus the last digit which is three. 67 00:04:27,110 --> 00:04:29,120 So output is 23. 68 00:04:29,690 --> 00:04:31,490 Now update the number. 69 00:04:31,550 --> 00:04:33,410 Number equals number by ten. 70 00:04:33,590 --> 00:04:34,760 So number will become zero. 71 00:04:34,790 --> 00:04:35,700 And I will stop. 72 00:04:37,040 --> 00:04:40,130 And this is my output in variable reverse. 73 00:04:42,260 --> 00:04:47,750 So only this multiplication things extra because we cannot add normally. 74 00:04:48,330 --> 00:04:50,960 OK, now let's take one more example. 75 00:04:51,710 --> 00:04:54,860 Suppose the value of end is 123. 76 00:04:55,670 --> 00:04:57,290 Initially reverse is zero. 77 00:04:57,800 --> 00:05:00,050 Last digit is three. 78 00:05:01,730 --> 00:05:03,250 OK, so the reverse. 79 00:05:03,580 --> 00:05:11,100 It was all really of reverse multiply by ten plus last digit, which is three some outputs, three. 80 00:05:11,470 --> 00:05:12,670 So a reverse history. 81 00:05:13,240 --> 00:05:14,240 Now update the number. 82 00:05:14,260 --> 00:05:15,380 Number will become twelve. 83 00:05:16,620 --> 00:05:19,290 So the reverse is three. 84 00:05:19,840 --> 00:05:21,070 And we're doing the last digit. 85 00:05:21,250 --> 00:05:22,270 It will be two. 86 00:05:23,470 --> 00:05:26,320 So a reverse equals all of reverse. 87 00:05:27,070 --> 00:05:28,040 Multiply by ten. 88 00:05:28,530 --> 00:05:30,010 Blessed last digit, which is two. 89 00:05:30,420 --> 00:05:31,640 So thirty two. 90 00:05:32,380 --> 00:05:33,470 Now update the number. 91 00:05:33,490 --> 00:05:37,080 Number becomes one reverses today. 92 00:05:37,990 --> 00:05:39,310 So what do I last Richard. 93 00:05:39,460 --> 00:05:40,700 It will be one. 94 00:05:41,900 --> 00:05:42,150 OK. 95 00:05:42,490 --> 00:05:45,210 So reverse it because all the value of reverse. 96 00:05:45,310 --> 00:05:49,720 We just had to multiply by ten plus last digit. 97 00:05:49,750 --> 00:05:50,360 Which is one. 98 00:05:51,490 --> 00:05:53,150 So reverses to 21. 99 00:05:54,020 --> 00:05:55,120 Now ablated the number. 100 00:05:55,390 --> 00:05:57,240 So number equals number by ten. 101 00:05:57,520 --> 00:05:59,350 So one by ten is zero point one. 102 00:05:59,410 --> 00:06:01,270 But in upon integer will be integer. 103 00:06:01,300 --> 00:06:02,440 So number equals zero. 104 00:06:02,440 --> 00:06:02,950 Zero means. 105 00:06:03,010 --> 00:06:03,490 Stop. 106 00:06:05,150 --> 00:06:05,540 Stop. 107 00:06:05,620 --> 00:06:09,280 And this is why as a 221 123. 108 00:06:10,710 --> 00:06:12,000 So I think you've heard the logic. 109 00:06:13,140 --> 00:06:14,060 So what we will do? 110 00:06:17,820 --> 00:06:23,810 So initially, my reverse is a zero, right zero, because otherwise it will contain garbage, will 111 00:06:23,830 --> 00:06:24,020 you? 112 00:06:25,460 --> 00:06:33,260 So surveille number is greater than zero whilom, but is not to close to zero or whilom, but it is 113 00:06:33,260 --> 00:06:33,850 a good thing zero. 114 00:06:33,920 --> 00:06:34,880 They're both the same. 115 00:06:35,600 --> 00:06:37,220 We have to find last digit. 116 00:06:37,750 --> 00:06:41,480 So last digit equals no more than now. 117 00:06:41,480 --> 00:06:49,970 We've got the last digit and reverse equals reverse and multiply it by 10 plus last digit. 118 00:06:52,160 --> 00:06:55,830 And then we have to update the number, number, request number by ten. 119 00:06:56,900 --> 00:07:01,040 And finally, our output will be Reavers. 120 00:07:01,970 --> 00:07:04,770 So this is the code that we have to write. 121 00:07:05,810 --> 00:07:08,390 Okay, so the logic is very simple. 122 00:07:09,350 --> 00:07:13,010 In case of some head, it was some equals zero. 123 00:07:13,040 --> 00:07:19,010 And I heard it was some it equals some plus last digit rest. 124 00:07:19,160 --> 00:07:20,660 All things were the same. 125 00:07:20,870 --> 00:07:23,510 And here I was having see out some. 126 00:07:25,620 --> 00:07:33,410 And some so this you can compare just we have changed the very real name because in the previous problem 127 00:07:33,420 --> 00:07:38,370 and we won't talk, I read some hatred on Caligula was suggested the name of the variable is changed. 128 00:07:38,760 --> 00:07:42,030 The main differences, we are multiplying by ten now. 129 00:07:43,380 --> 00:07:43,600 OK. 130 00:07:43,750 --> 00:07:44,920 So this is the main difference. 131 00:07:45,370 --> 00:07:46,420 So let us ride called. 132 00:07:52,720 --> 00:07:56,800 So now it does name this file is reverse. 133 00:07:59,760 --> 00:08:00,240 Off. 134 00:08:01,710 --> 00:08:04,290 No, not CPV. 135 00:08:16,230 --> 00:08:22,530 So now what I have to do, I will take a number and and put fundi, use it. 136 00:08:24,260 --> 00:08:28,260 I am taking a variable in reverse, which is initially zero. 137 00:08:29,010 --> 00:08:33,510 So while my number is greater than zero. 138 00:08:34,170 --> 00:08:35,010 What I have to do. 139 00:08:38,630 --> 00:08:41,010 I have to find the last digit first. 140 00:08:41,220 --> 00:08:50,370 So end last night, it equals no more then. 141 00:08:50,460 --> 00:09:03,120 So do you give me the last budget and reverse equals halo's multiplied by 10 plus last digit. 142 00:09:05,040 --> 00:09:12,720 And then we have to update our number, so, no, it was number by then. 143 00:09:14,760 --> 00:09:16,350 And finally, I will print. 144 00:09:17,170 --> 00:09:20,460 He was Soucy out reverse. 145 00:09:21,590 --> 00:09:24,020 OK, so this is all that we have to do. 146 00:09:26,330 --> 00:09:28,520 Now, let us test our program. 147 00:09:30,910 --> 00:09:37,080 So let's say the value of and is 123, so our parties to twenty one. 148 00:09:39,210 --> 00:09:44,490 Let's say my input is, well, same output is twenty one. 149 00:09:47,170 --> 00:09:52,750 So if the value of friend is, let's say, three, six, five, four, some output is four, five, 150 00:09:52,840 --> 00:09:53,710 six, three. 151 00:09:55,280 --> 00:09:56,620 Now, let us bastard. 152 00:09:56,850 --> 00:09:57,660 Well, last time. 153 00:10:01,050 --> 00:10:03,560 So let's hear my input is hindered. 154 00:10:04,140 --> 00:10:09,690 So what should be my output, my output should be zero zero one. 155 00:10:10,480 --> 00:10:12,390 But let's see what will be my output. 156 00:10:13,050 --> 00:10:16,230 So my output is coming out to be one. 157 00:10:19,580 --> 00:10:27,980 So if the number is a hundred, my output should be zero zero one, but it is coming out to be when? 158 00:10:29,500 --> 00:10:30,550 How so? 159 00:10:30,710 --> 00:10:34,740 Let us right in our program to see what went wrong. 160 00:10:40,700 --> 00:10:45,910 So my number and is hindered initially. 161 00:10:46,520 --> 00:10:48,290 Reverse is zero. 162 00:10:48,920 --> 00:10:50,690 And so what will be my last digit? 163 00:10:50,900 --> 00:10:52,490 Last digit will be zero. 164 00:10:53,270 --> 00:11:01,610 So reverse it was reverse, multiply by 10 plus last digit, which is zero. 165 00:11:02,120 --> 00:11:05,150 Now update the value and will become 10. 166 00:11:06,070 --> 00:11:08,000 So the reverse is zero. 167 00:11:08,570 --> 00:11:10,880 Last digit is again zero. 168 00:11:11,690 --> 00:11:14,180 And reverse is a reverse. 169 00:11:14,480 --> 00:11:18,480 Multiply it by 10 plus last digit. 170 00:11:19,050 --> 00:11:20,760 So reverses again zero. 171 00:11:21,140 --> 00:11:22,310 Now update the numbers. 172 00:11:22,310 --> 00:11:23,960 A number becomes one. 173 00:11:25,100 --> 00:11:25,840 Reverses. 174 00:11:26,090 --> 00:11:26,600 Zero. 175 00:11:26,990 --> 00:11:28,340 So what will be my last digit? 176 00:11:28,550 --> 00:11:29,480 Which is one. 177 00:11:30,520 --> 00:11:33,080 So a reverse equals reverse. 178 00:11:33,440 --> 00:11:36,890 Multiply by ten plus the last digit. 179 00:11:37,240 --> 00:11:41,300 So my reverses, when not update the number number will become zero. 180 00:11:41,690 --> 00:11:45,440 I will stop and my output will be one. 181 00:11:45,920 --> 00:11:46,990 So that is the reason. 182 00:11:47,420 --> 00:11:48,990 When is my output. 183 00:11:50,950 --> 00:11:51,320 Margaret. 184 00:11:52,260 --> 00:11:54,090 So how we can solve this problem? 185 00:11:54,390 --> 00:11:54,960 Any idea? 186 00:11:57,720 --> 00:12:00,160 So we can solve this problem, but we will lose. 187 00:12:00,540 --> 00:12:02,450 So first, let us come into doubt. 188 00:12:05,030 --> 00:12:11,270 So this solution that we have commented, so this solution that we are committed at is absolutely fine. 189 00:12:11,810 --> 00:12:17,420 No one will check gold 400 at least in your college or in your school. 190 00:12:17,510 --> 00:12:18,530 No one is gonna check. 191 00:12:19,070 --> 00:12:20,960 So this court is hundred percent correct. 192 00:12:21,710 --> 00:12:23,480 But what extra you can do is. 193 00:12:26,630 --> 00:12:30,590 You just find the last digit and just print the last digit. 194 00:12:31,520 --> 00:12:36,860 So while limbered is good in zero, just print the last digit. 195 00:12:36,980 --> 00:12:41,100 So she wrote last digit, which is no more than. 196 00:12:43,440 --> 00:12:46,760 And number equals number by an. 197 00:12:49,790 --> 00:12:50,600 Now, that is all. 198 00:12:54,480 --> 00:12:59,550 As soon as you find the last digit, as soon as you find the last digit just printed. 199 00:13:00,870 --> 00:13:07,830 So a guest star program led to the release of 123 so Tilda and doing find the last digit and Brent. 200 00:13:10,490 --> 00:13:11,770 Let them my in four days. 201 00:13:12,040 --> 00:13:14,330 Three, two, one, three, two, five, six, four. 202 00:13:14,870 --> 00:13:16,900 So Margaret is four, six, five, two, three. 203 00:13:17,620 --> 00:13:19,690 And now let's say my input is handed. 204 00:13:20,530 --> 00:13:21,490 My input is handed. 205 00:13:21,550 --> 00:13:24,430 So my output is zero zero one, which is correct. 206 00:13:25,590 --> 00:13:30,340 So how it is working, let's say, for any quiz? 207 00:13:30,390 --> 00:13:31,290 123. 208 00:13:31,560 --> 00:13:32,430 So what did we do? 209 00:13:32,490 --> 00:13:34,680 Find the last digit, which is three Braintree. 210 00:13:36,240 --> 00:13:38,030 Normally we come to Brent. 211 00:13:38,220 --> 00:13:38,820 Last digit. 212 00:13:39,060 --> 00:13:44,100 So 22 printed upbraid the number normally come when find the last resort. 213 00:13:44,220 --> 00:13:46,860 And Brent when number really becomes zero. 214 00:13:47,040 --> 00:13:47,820 This is my answer. 215 00:13:48,570 --> 00:13:54,990 When I leave, the value of Andy's is hundred branded the last digit zero upbraid the number normally 216 00:13:54,990 --> 00:13:55,540 become 10. 217 00:13:55,890 --> 00:13:58,760 Brent, the last digit update number. 218 00:13:59,200 --> 00:14:01,200 Ben, the last digit update. 219 00:14:01,230 --> 00:14:03,220 The number number becomes zero. 220 00:14:03,360 --> 00:14:03,780 Stop. 221 00:14:04,500 --> 00:14:08,880 This is my output for near-term output is coming out with zero zero one. 222 00:14:10,330 --> 00:14:17,530 OK, so just we are printing the last digit and more, ten and more means the last digit. 223 00:14:21,720 --> 00:14:27,720 OK, this is last digit, but there is a problem with this solution. 224 00:14:28,770 --> 00:14:29,780 So what is the problem? 225 00:14:31,380 --> 00:14:40,320 So, for example, what I want to do is after finding that it was I want to perform some operation on 226 00:14:40,320 --> 00:14:40,790 the reverse. 227 00:14:41,760 --> 00:14:45,300 So in this case, I am not starting that rehearsed number. 228 00:14:45,360 --> 00:14:48,930 So how can I perform operation on the reverse of the number? 229 00:14:50,320 --> 00:14:56,520 Here in this case, if you want to perform some operation, we can write, for example, reverse equals 230 00:14:56,850 --> 00:14:59,380 reverse, plus anything that you want to do. 231 00:14:59,400 --> 00:15:00,800 For example, add Dwil. 232 00:15:01,170 --> 00:15:05,490 So here I can do I can add two L to the reverse of the number. 233 00:15:06,040 --> 00:15:08,230 But here in this case. 234 00:15:09,090 --> 00:15:16,020 I haven't installed the reverse of the number, so I cannot add it to L in this code. 235 00:15:17,160 --> 00:15:20,500 OK, so if someone asks you, which is the correct approach. 236 00:15:20,910 --> 00:15:22,680 So I Bovin is correct approach. 237 00:15:22,720 --> 00:15:24,750 And this is not correct approach. 238 00:15:25,260 --> 00:15:26,160 So this is correct. 239 00:15:26,190 --> 00:15:32,400 The second approach is correct only when the question was just to print reverse of a number. 240 00:15:33,970 --> 00:15:34,210 OK. 241 00:15:34,520 --> 00:15:44,580 So if the question was so if the question was just print the reverse of no, just print reverse. 242 00:15:45,770 --> 00:15:51,410 My question is just print reverse, then this cord is hundred percent correct. 243 00:15:54,470 --> 00:16:02,450 But if the cautions sees, write a program to find the reverse of the number and add 10 to the number 244 00:16:02,510 --> 00:16:03,820 and then print reserved. 245 00:16:04,850 --> 00:16:05,120 OK. 246 00:16:05,780 --> 00:16:11,120 If caution is something like this, find the reverse of the number and attend to the number and then 247 00:16:11,270 --> 00:16:12,110 print the result. 248 00:16:12,650 --> 00:16:19,040 So this is much a better approach because here we are having the number stored in my variable reverse. 249 00:16:19,100 --> 00:16:22,800 So we can add what we can perform any operation or net them. 250 00:16:22,880 --> 00:16:29,450 But so if in university exam, anyone ask you to find the reverse of the number, the first approach 251 00:16:29,450 --> 00:16:30,050 is correct. 252 00:16:31,220 --> 00:16:32,360 Second approach is wrong. 253 00:16:34,440 --> 00:16:34,720 OK. 254 00:16:35,300 --> 00:16:38,240 So teacher will give you marks only when you write this call. 255 00:16:38,860 --> 00:16:40,490 They will not give your marks for this call. 256 00:16:44,010 --> 00:16:50,390 So that means if I had the first call for any quiz, hundred more bodies. 257 00:16:50,700 --> 00:16:52,920 Again, when so can resolve this problem. 258 00:16:54,480 --> 00:16:55,650 Can we solve this problem? 259 00:17:01,970 --> 00:17:02,790 What I'm saying. 260 00:17:03,980 --> 00:17:11,260 I am telling you to follow this approach, word for any was handed, it is giving me one as output when 261 00:17:11,300 --> 00:17:13,110 asked to correct outproduce zero zero one. 262 00:17:13,330 --> 00:17:14,710 So can we solve this problem? 263 00:17:15,040 --> 00:17:17,730 So the answer is yes, we can solve this problem. 264 00:17:18,220 --> 00:17:22,030 Myrt, with the current knowledge that we have, we cannot solve this problem. 265 00:17:24,430 --> 00:17:27,730 We have to study Eddi for solving this problem. 266 00:17:29,440 --> 00:17:29,680 OK. 267 00:17:29,800 --> 00:17:35,560 So with the help of very this best case, finanical sended, this can be sold. 268 00:17:36,630 --> 00:17:37,540 When we study, Eddie. 269 00:17:38,350 --> 00:17:45,960 So after starting the Eddie, we really mortified discord and discord will work for an equals hundred 270 00:17:45,990 --> 00:17:46,520 as well. 271 00:17:48,440 --> 00:17:48,730 OK. 272 00:17:49,250 --> 00:17:52,580 So there is one more interesting thing that I want to tell you. 273 00:17:53,270 --> 00:18:02,660 So remember I told you something like I told you did in beta is of four bytes and what is my limit quoted? 274 00:18:02,720 --> 00:18:07,400 About 30 went to minus one to minus two to the power to do. 275 00:18:07,400 --> 00:18:10,970 And this was the range of the integer. 276 00:18:11,390 --> 00:18:14,570 And I don't do remember that it is ten to the power. 277 00:18:14,570 --> 00:18:15,230 Nine digits. 278 00:18:17,990 --> 00:18:18,680 Nine digits. 279 00:18:18,710 --> 00:18:19,300 You can remember. 280 00:18:19,400 --> 00:18:24,790 Okay, so this number I also told you that this number has a name intermix. 281 00:18:27,050 --> 00:18:28,910 So what will happen if you reverse. 282 00:18:29,150 --> 00:18:30,640 If you reverse intermix? 283 00:18:32,090 --> 00:18:32,750 What will happen. 284 00:18:33,320 --> 00:18:34,970 So there will be integer overflow. 285 00:18:35,420 --> 00:18:36,140 Let me show you. 286 00:18:39,060 --> 00:18:40,140 Just remove it. 287 00:18:42,360 --> 00:18:43,580 Let's see the value of it. 288 00:18:43,780 --> 00:18:44,930 And is intermix. 289 00:18:48,450 --> 00:18:50,940 And Dumex me is true, the boat do and minus one. 290 00:18:51,000 --> 00:18:52,400 So the real friend is intermix. 291 00:18:53,700 --> 00:18:57,660 And let's say for the time being, Commander Daoud. 292 00:19:01,760 --> 00:19:03,520 And let us try to bring the valley off. 293 00:19:03,570 --> 00:19:05,520 And so she yelled. 294 00:19:07,230 --> 00:19:11,720 And now let's see what is the value of intermix. 295 00:19:13,700 --> 00:19:16,330 That makes in a murder can we can stored in India. 296 00:19:17,000 --> 00:19:20,030 So this is the maximum number undertaken store in India. 297 00:19:23,310 --> 00:19:32,130 OK, so two one four seven four eight three, six, four and seven. 298 00:19:32,670 --> 00:19:34,430 So this is endemics. 299 00:19:37,350 --> 00:19:40,000 Or against a two to the power tactic, one minus one. 300 00:19:40,390 --> 00:19:41,860 So this is the maximum number. 301 00:19:41,980 --> 00:19:48,300 This is the maximum number of dirt I can store in four bytes or a 32 bids. 302 00:19:50,260 --> 00:19:53,050 So what will happen if you try to reverse this number? 303 00:19:53,500 --> 00:20:04,300 So what is the reverse of this number seven forward six three eight four seven forward one two. 304 00:20:04,660 --> 00:20:07,390 So this is the reverse of this number. 305 00:20:08,110 --> 00:20:09,010 Now, tell me. 306 00:20:09,280 --> 00:20:11,500 Let's say this is an Atlanta decision was. 307 00:20:14,440 --> 00:20:15,820 So have you observed one thing? 308 00:20:15,910 --> 00:20:17,590 Reverse is greater than the number. 309 00:20:19,270 --> 00:20:20,920 This is a starting from two. 310 00:20:20,980 --> 00:20:22,660 And this is starting from seven. 311 00:20:23,200 --> 00:20:24,700 And the number of digits, I seem. 312 00:20:28,770 --> 00:20:36,300 So a starting point here is to and starting point here is seven and the number of digits in both and 313 00:20:36,390 --> 00:20:40,700 and reverse are seem so reverse is good then. 314 00:20:40,770 --> 00:20:44,470 And that we can see that we can that we are observing. 315 00:20:44,820 --> 00:20:49,110 But I told you that the maximum number that we can store is this number. 316 00:20:49,920 --> 00:20:52,940 So how we can store this number in four bytes. 317 00:20:54,180 --> 00:20:56,400 How we can store this number in four bytes. 318 00:20:56,550 --> 00:20:58,560 So the answer is we cannot store. 319 00:21:00,830 --> 00:21:02,390 OK, so what will happen? 320 00:21:02,840 --> 00:21:04,130 So this is intermix. 321 00:21:06,800 --> 00:21:13,220 So as soon as you will try you, as soon as you will find a number greater than intermix. 322 00:21:13,580 --> 00:21:19,200 So I told you, wrap around so intermixed plus one, we will reach into a minimum. 323 00:21:21,720 --> 00:21:22,010 OK. 324 00:21:22,430 --> 00:21:26,690 So as soon as you will cross the valley of Intermix, you will reach into minimum. 325 00:21:28,370 --> 00:21:32,120 So this number will not get benter in Strood. 326 00:21:32,210 --> 00:21:33,380 A negative number. 327 00:21:33,710 --> 00:21:37,740 A negative number will be Hmoud put out a negative number. 328 00:21:37,850 --> 00:21:40,720 Will be my output. 329 00:21:42,300 --> 00:21:42,690 Why? 330 00:21:42,830 --> 00:21:45,080 Because I wrap around. 331 00:21:46,670 --> 00:21:55,760 We take place and via it happened will take place because the reverse is greater than the number. 332 00:21:56,150 --> 00:21:58,460 And this number is endemics. 333 00:22:00,560 --> 00:22:02,770 So the reverse is greater than intermix. 334 00:22:03,250 --> 00:22:07,120 Hence it will reach into minimum minus two to the power 31. 335 00:22:07,220 --> 00:22:07,850 Minus one. 336 00:22:08,440 --> 00:22:08,730 OK. 337 00:22:09,470 --> 00:22:11,030 So negative number value output. 338 00:22:11,240 --> 00:22:12,440 This is this thing clear. 339 00:22:12,560 --> 00:22:14,870 So we call this thing as in digit overflow. 340 00:22:15,720 --> 00:22:17,240 In deja overflow. 341 00:22:19,430 --> 00:22:21,100 This thing is called and dijo and flow. 342 00:22:21,590 --> 00:22:22,550 So let me show you. 343 00:22:29,820 --> 00:22:33,030 Now, let us find the reverse of intermix. 344 00:22:34,920 --> 00:22:36,510 Noller does test our program. 345 00:22:39,040 --> 00:22:45,020 So you can see here, this was my number and this is the reverse of the above number. 346 00:22:45,640 --> 00:22:52,780 And it is negative via negative because in digital of law is there wrap around is taking place. 347 00:22:54,630 --> 00:22:54,920 OK. 348 00:22:55,890 --> 00:23:03,950 So I hope you got the logic, but don't worry, these kinds of things will never be asked in college 349 00:23:03,950 --> 00:23:05,310 or high school, high school exams. 350 00:23:06,090 --> 00:23:12,120 But these things may be axed in interviews of top tech companies, for example, Google, Facebook, 351 00:23:12,660 --> 00:23:14,730 Amazon, Microsoft. 352 00:23:15,650 --> 00:23:15,830 OK. 353 00:23:15,930 --> 00:23:18,660 So you have to take care of these things also. 354 00:23:19,190 --> 00:23:21,330 I am not covering how to handle this case. 355 00:23:22,550 --> 00:23:23,680 I will cover it later. 356 00:23:25,290 --> 00:23:28,170 But you should know when winning the general will take place. 357 00:23:28,880 --> 00:23:29,110 OK. 358 00:23:29,670 --> 00:23:30,960 So just open your mind. 359 00:23:31,110 --> 00:23:33,630 Think of all the possibilities that can happen. 360 00:23:36,460 --> 00:23:37,090 OK, guys. 361 00:23:37,140 --> 00:23:40,330 So this is it for this video. 362 00:23:41,200 --> 00:23:41,630 Thank you.