| 1 |
https://codeforces.com/problemset/problem/978/C |
|
简单 |
| 2 |
https://codeforces.com/problemset/problem/1015/C |
|
简单 |
| 3 |
https://codeforces.com/problemset/problem/99/B |
|
简单 |
| 4 |
https://codeforces.com/problemset/problem/192/A |
|
|
| 5 |
https://www.51nod.com/Challenge/Problem.html#problemId=2138 |
|
较简单 |
| 6 |
https://acm.hdu.edu.cn/showproblem.php?pid=5702 |
|
简单 |