@[eastcloud](/user/421265)
```
ans=(ans+query(1,num[u],num[top[u]]))%mod;
```
反了……
by pidan @ 2022-06-29 20:45:57
@[pidan](/user/191538) 感谢，还有什么问题吗，改了还是过不去
by eastcloud @ 2022-06-29 21:01:34
我实在是看不出来了2333
by eastcloud @ 2022-06-29 21:02:24
@[eastcloud](/user/421265)
```
v(x)=(v(x)+v*(r-l+1))%mod;(in change)
```
r(x)-l(x)+1……
by pidan @ 2022-06-29 21:33:08
@[eastcloud](/user/421265) 建议多加几个mod
by pidan @ 2022-06-29 21:37:59
@[pidan](/user/191538) 过了！感谢大佬
by eastcloud @ 2022-07-01 19:40:23