1 00:00:01,170 --> 00:00:03,060 Hey, guys, what's up? 2 00:00:03,480 --> 00:00:06,880 So today we are going to solve one more interesting problem on Eddie. 3 00:00:07,740 --> 00:00:09,120 So the problem is very easy. 4 00:00:09,210 --> 00:00:10,320 We have to reverse the Eddie. 5 00:00:12,120 --> 00:00:13,860 Reveals the ending. 6 00:00:15,330 --> 00:00:25,320 So, for example, if my is, let's say, one, four, five and seven, so my ad, it should become 7 00:00:25,560 --> 00:00:29,460 seven, five, four and one. 8 00:00:30,390 --> 00:00:30,600 OK. 9 00:00:30,660 --> 00:00:34,080 So we have to reverse these at a in the previous problem. 10 00:00:34,200 --> 00:00:37,080 The problem was we have to print the ad in reverse order. 11 00:00:37,620 --> 00:00:39,750 So we were printing that in reverse order. 12 00:00:39,810 --> 00:00:41,190 So that was the reverse print. 13 00:00:42,270 --> 00:00:43,620 But this problem is different. 14 00:00:44,010 --> 00:00:45,960 And this problem, I have to reverse the ad. 15 00:00:46,650 --> 00:00:49,290 OK, so my new ad a little bit this. 16 00:00:51,180 --> 00:00:57,900 For example, if my hat is one, two, three, four and five. 17 00:00:58,290 --> 00:00:59,790 So my array should become. 18 00:01:01,950 --> 00:01:05,550 Five, four, three, two and one. 19 00:01:05,880 --> 00:01:08,510 So in this problem, we are not doing printing. 20 00:01:08,850 --> 00:01:10,610 We are in fact reversing the error. 21 00:01:11,610 --> 00:01:13,060 So how we can solve this problem. 22 00:01:13,090 --> 00:01:13,800 So the problem. 23 00:01:14,370 --> 00:01:16,500 So the algorithm for this problem is very easy. 24 00:01:18,090 --> 00:01:20,130 So what we have to do is suppose. 25 00:01:21,440 --> 00:01:23,030 So let us take small example. 26 00:01:23,240 --> 00:01:24,590 So suppose my ad is. 27 00:01:29,420 --> 00:01:38,350 Let's say there are six elements in the area, so two, four, five, one. 28 00:01:40,490 --> 00:01:48,760 Let's see, my elements are six and seven, so then let's say there are six elements in my area. 29 00:01:49,160 --> 00:01:51,480 So what I will do, I will take two pointers. 30 00:01:52,710 --> 00:01:54,490 So this is my start pointer. 31 00:01:55,190 --> 00:01:56,270 And this is my. 32 00:01:56,930 --> 00:01:57,640 And pointer. 33 00:01:58,530 --> 00:01:58,800 OK. 34 00:01:59,090 --> 00:02:02,270 So initially Starbase zero and is. 35 00:02:02,350 --> 00:02:03,290 And minus one. 36 00:02:03,830 --> 00:02:04,550 What I really do. 37 00:02:04,640 --> 00:02:05,350 I will swap. 38 00:02:06,290 --> 00:02:07,460 I will swab. 39 00:02:07,960 --> 00:02:08,520 Start. 40 00:02:09,440 --> 00:02:12,590 And so you will be slapped with seven. 41 00:02:12,980 --> 00:02:15,440 So here will come here. 42 00:02:15,560 --> 00:02:16,430 Seven will come. 43 00:02:17,430 --> 00:02:24,390 Then what I will do, I will increment as so as will come here and and I will come here. 44 00:02:24,450 --> 00:02:25,940 I will decrement E! 45 00:02:26,700 --> 00:02:30,150 So start bless plus and minus minus. 46 00:02:30,780 --> 00:02:32,590 Then again, I will do the swapping. 47 00:02:33,180 --> 00:02:35,130 So formally we sabata with the six. 48 00:02:36,560 --> 00:02:41,210 Then again, Start will come here and will come here. 49 00:02:41,480 --> 00:02:43,240 So five will be served with one. 50 00:02:43,910 --> 00:02:45,590 So five is so out of it. 51 00:02:45,940 --> 00:02:48,440 When then what will happen now? 52 00:02:49,550 --> 00:02:55,040 Start will come here because we are doing start plus plus and and will come here. 53 00:02:56,120 --> 00:02:57,200 So this is my end. 54 00:02:58,190 --> 00:03:01,490 Now what happened is start becomes greater then. 55 00:03:01,640 --> 00:03:04,880 And so if this is the condition where we have to do. 56 00:03:05,090 --> 00:03:05,600 Break. 57 00:03:06,950 --> 00:03:07,310 Break. 58 00:03:07,400 --> 00:03:08,230 Our problem is. 59 00:03:08,260 --> 00:03:08,690 Or what. 60 00:03:08,830 --> 00:03:11,120 And our new Addy's seven. 61 00:03:11,750 --> 00:03:12,560 Then six. 62 00:03:12,790 --> 00:03:13,580 Then one. 63 00:03:14,120 --> 00:03:14,870 Then five. 64 00:03:15,470 --> 00:03:16,130 Then four. 65 00:03:16,550 --> 00:03:17,150 And then two. 66 00:03:17,180 --> 00:03:18,350 So this is my new. 67 00:03:19,780 --> 00:03:25,420 And my previous said it was two, four, five, one, six and seven. 68 00:03:27,020 --> 00:03:28,490 So this was way out already. 69 00:03:29,630 --> 00:03:38,120 And this is and this is my updated area, so you can compare the additive also featured that. 70 00:03:39,270 --> 00:03:39,480 OK. 71 00:03:40,870 --> 00:03:42,640 So this we have to do. 72 00:03:43,790 --> 00:03:45,470 So the logic is very simple. 73 00:03:46,790 --> 00:03:49,360 So I've already made a final reverse, I not see. 74 00:03:50,330 --> 00:03:54,290 First, let us take input and then. 75 00:03:59,360 --> 00:04:00,440 That doesn't make any. 76 00:04:05,370 --> 00:04:06,310 Now we have to take. 77 00:04:07,410 --> 00:04:08,940 And we lose as input. 78 00:04:15,590 --> 00:04:16,510 Down, I 79 00:04:19,600 --> 00:04:21,670 know that reverse logic was very simple. 80 00:04:21,790 --> 00:04:22,510 Where do we have to do? 81 00:04:22,570 --> 00:04:27,700 We have to date 2.0 start is initially zero and is initially and minus one. 82 00:04:29,820 --> 00:04:40,430 So my start is initially zero and and is initially at last index. 83 00:04:41,250 --> 00:04:50,490 So how many times I have to perform swopping while my start while my start is less than or equal to. 84 00:04:50,940 --> 00:04:53,400 And so this is the condition. 85 00:04:53,610 --> 00:04:54,780 I have to swab. 86 00:04:55,620 --> 00:04:58,500 So swab it off. 87 00:04:58,590 --> 00:04:59,130 Start. 88 00:05:04,720 --> 00:05:05,270 It off. 89 00:05:05,570 --> 00:05:07,220 And so we are doing scrapping. 90 00:05:08,000 --> 00:05:17,210 So after stepping would have to do start was Implementor and and was DiClemente to start plus plus and 91 00:05:17,270 --> 00:05:18,110 minus minus. 92 00:05:19,400 --> 00:05:19,640 OK. 93 00:05:20,150 --> 00:05:25,100 So then with each line number 22, I would add it will be in reverse order. 94 00:05:25,880 --> 00:05:28,370 OK, so this is all that we have to do. 95 00:05:29,210 --> 00:05:30,230 Now let us print. 96 00:05:30,460 --> 00:05:34,510 Eddie so see you out after. 97 00:05:35,150 --> 00:05:39,020 He was so after he was. 98 00:05:39,240 --> 00:05:40,190 This is my Eddie. 99 00:05:44,450 --> 00:05:48,830 So forward and I equals zero. 100 00:05:49,310 --> 00:05:51,200 I lost him and I bless bliss. 101 00:05:53,510 --> 00:05:56,210 See out of I. 102 00:05:59,580 --> 00:06:03,570 And similarly, her dad spent before doing he was. 103 00:06:08,810 --> 00:06:09,740 So before. 104 00:06:12,790 --> 00:06:13,820 Before reverse. 105 00:06:14,790 --> 00:06:16,240 Now, let us test our program. 106 00:06:19,070 --> 00:06:22,160 Suppose there are four elements and the elements are. 107 00:06:23,280 --> 00:06:25,680 Five, one, two and three. 108 00:06:27,810 --> 00:06:29,370 OK, so there is an error. 109 00:06:30,450 --> 00:06:31,800 So what happened here is. 110 00:06:33,730 --> 00:06:34,960 Before reverse. 111 00:06:37,720 --> 00:06:42,910 So and and CNN equals zero less than an. 112 00:06:45,040 --> 00:06:46,540 Saying I before. 113 00:06:48,320 --> 00:06:50,450 I close, you know, I listed nine plus plus. 114 00:06:52,170 --> 00:06:54,050 So what happened wrong here? 115 00:06:56,580 --> 00:06:56,930 Start. 116 00:06:58,570 --> 00:07:00,190 So first to bend. 117 00:07:02,320 --> 00:07:03,580 Now let us not go well. 118 00:07:06,560 --> 00:07:08,880 There are two elementally one and two. 119 00:07:10,370 --> 00:07:11,120 Sixteen. 120 00:07:13,420 --> 00:07:14,930 So what is happening here? 121 00:07:19,070 --> 00:07:20,060 We created. 122 00:07:21,670 --> 00:07:23,320 I quote to a listing in. 123 00:07:24,600 --> 00:07:27,060 Shapelessness seen I. 124 00:07:27,180 --> 00:07:30,410 Okay, so it was a sit in I. 125 00:07:31,860 --> 00:07:34,350 And it should have been seen if I. 126 00:07:38,120 --> 00:07:39,380 OK, so this was Deanna. 127 00:07:47,300 --> 00:07:51,410 Now, there are plenty of water elements and elements are two six, one in four. 128 00:07:52,710 --> 00:07:55,820 So let's bring in one line. 129 00:08:20,500 --> 00:08:21,340 Now, let's test. 130 00:08:22,980 --> 00:08:26,490 So there are four elements and elements are two, six, one and full. 131 00:08:27,690 --> 00:08:30,520 So before reverse, this is my element. 132 00:08:30,600 --> 00:08:33,870 And after reverse, this is out of my element. 133 00:08:34,380 --> 00:08:37,380 So the defense we're doing this probably on the last order is that. 134 00:08:37,900 --> 00:08:40,230 And this problem, we are reversing the. 135 00:08:41,380 --> 00:08:41,600 OK. 136 00:08:41,700 --> 00:08:43,350 We are printing from left to right. 137 00:08:43,980 --> 00:08:45,690 We are printing from left to right. 138 00:08:45,720 --> 00:08:48,720 In the previous problem, we were printing from right to left. 139 00:08:49,590 --> 00:08:52,440 So let us tested for one more time. 140 00:08:52,850 --> 00:08:57,720 Number of elements are five and the elements are one five, nine, three and two. 141 00:08:58,800 --> 00:09:00,270 So this is before reverse. 142 00:09:00,520 --> 00:09:02,250 And this is after reelers. 143 00:09:03,040 --> 00:09:03,240 OK. 144 00:09:03,390 --> 00:09:05,160 So my code is working. 145 00:09:05,190 --> 00:09:05,940 Hundred percent. 146 00:09:06,090 --> 00:09:06,510 Correct. 147 00:09:07,320 --> 00:09:09,930 So if you have any doubt, feel free to ask. 148 00:09:10,410 --> 00:09:11,790 So this is it for this video. 149 00:09:11,880 --> 00:09:12,580 Thank you.