| # | User | Rating |
|---|---|---|
| 1 | tourist | 3880 |
| 2 | jiangly | 3669 |
| 3 | ecnerwala | 3654 |
| 4 | Benq | 3627 |
| 5 | orzdevinwang | 3612 |
| 6 | Geothermal | 3569 |
| 6 | cnnfls_csy | 3569 |
| 8 | jqdai0815 | 3532 |
| 9 | Radewoosh | 3522 |
| 10 | gyh20 | 3447 |
| # | User | Contrib. |
|---|---|---|
| 1 | awoo | 161 |
| 2 | maomao90 | 160 |
| 3 | adamant | 156 |
| 4 | maroonrk | 153 |
| 5 | atcoder_official | 149 |
| 6 | -is-this-fft- | 148 |
| 6 | SecondThread | 148 |
| 8 | Petr | 147 |
| 9 | nor | 144 |
| 10 | cry | 143 |
n = 6 a[] = {1, 1, 5, 2, 5, 5} answer = 1 ( swap a[0] with a[4] or a[5] )
n = 8 a[] = {1, 5, 5, 1, 4, 6, 1, 1} answer = 2 (swap a[0] with a[1] and a[5] with a[6] )
n = 8 a[] = {3, 1, 1, 5, 3, 3, 5, 5} answer = 2 (swap a[0] with a[1] and a[5] with a[6] )
indexing from zero in above examples.
