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by CCF_AK_ME @ 2023-10-17 19:01:13
@[Indrecht](/user/544844)
正在看
by whssy @ 2023-10-17 21:23:02
sorry,看错le
by whssy @ 2023-10-17 21:25:49
```cpp
int kth(int root, int L, int R, int k) {//主要在这
if (L == R) return L;
int mid = L + R >> 1, ms = tree[Lson ].sum;
if (k <= ms) return kth(Lson, L, mid, k);
else return kth(Rson, mid + 1, R, k - ms);
}
```
by whssy @ 2023-10-17 21:27:44
e,wa 了
by whssy @ 2023-10-17 21:32:11