new file: solutions/P6650.md

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hanyixuanten
2026-09-21 20:44:46 +08:00
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@@ -58,7 +58,7 @@ int main()
}
```
## 90 pts O(m log n)
## 100 pts O(m log n)
注意到一个区间内需要多次转移,非常浪费。可以考虑使用矩阵快速幂优化。