| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | ecnerwala | 3649 |
| 2 | Benq | 3581 |
| 3 | orzdevinwang | 3570 |
| 4 | Geothermal | 3569 |
| 4 | cnnfls_csy | 3569 |
| 6 | tourist | 3565 |
| 7 | maroonrk | 3531 |
| 8 | Radewoosh | 3521 |
| 9 | Um_nik | 3482 |
| 10 | jiangly | 3468 |
| Страны | Города | Организации | Всё → |
| № | Пользователь | Вклад |
|---|---|---|
| 1 | maomao90 | 174 |
| 2 | awoo | 164 |
| 3 | adamant | 161 |
| 4 | TheScrasse | 159 |
| 5 | nor | 158 |
| 6 | maroonrk | 156 |
| 7 | -is-this-fft- | 151 |
| 8 | SecondThread | 147 |
| 9 | orz | 146 |
| 10 | pajenegod | 145 |
PROBLEM : 1538C - Number of Pairs
119286813 -> my submission
119286794 -> some guy's java submission which got accepted
I fail to understand why my submission is failing when is has the exact same logic as the submission which got accepted.
I tried to make it work, but nothing seems to work.
I guess i'll have to say fuck off to java and use C++, because this is just demoralizing.
Arrays.sort() can be n^2 if you make the right test case.
Well, then why did the second submission get accepted? Both of them used Arrays.sort()
Arrays.sort() for primitives uses quick sort which is O(n^2) worst case. For array of objects (in this case Long[]), Arrays.sort() uses merge sort which is O(nlogn) worst case.