find有问题呢
by SamariumPhosphide @ 2020-05-31 09:32:23
@[fürtän](/user/319914) 具体哪里的问题啊
by mushroom_knight @ 2020-05-31 09:33:02
%%%萌新爆切树状数组
by _短笛无腔_ @ 2020-05-31 09:33:39
@[fürtän](/user/319914) 诶，似乎有道理，话说是不是我听课的时候耳朵瞎了
by mushroom_knight @ 2020-05-31 09:34:28
```cpp
cout<<find(y)-find(x-1);
```
换行?
by 幽竹烟雨 @ 2020-05-31 09:35:25
>@[幽竹烟雨](/user/162203) ...........
by mushroom_knight @ 2020-05-31 09:36:20
@[fürtän](/user/319914) but，还是不对啊
by mushroom_knight @ 2020-05-31 09:37:45
@[Ace_Translator](/user/338786)
```
void modify(int x,int y){
for(register int i=x;i<=n;i+=lowbit(i)){
t[i]+=y;
}
}
int find(int x){
int ans=0;
for(register int i=x;i;i-=lowbit(i)){
ans+=t[i];
}
return ans;
}
```
by Brian_WBY @ 2020-05-31 09:38:02
@[Ace_Translator](/user/338786)
```cpp
void modify(int x,int y){
for(register int i=x;i<=n;i+=lowbit(i)){
t[i]+=y;
}
}
```
modify函数的终止值怎么会是y呢
by 111l @ 2020-05-31 09:38:48
@[幽竹烟雨](/user/162203) `x-=lowbit(i)` CE谢谢
by Chthollytxdy @ 2020-05-31 09:40:58