Cu ball
by expnoi @ 2022-01-15 19:36:22
lower_bound,upper_bound
by Misaka_Mik0t0 @ 2022-01-15 19:37:29
P1182
by shiwei06232 @ 2022-01-15 19:37:46
~~[二分有没有什么较好的模板啊](https://www.luogu.com.cn/problem/list?keyword=&tag=45&page=1)~~
by 欢黎明陌 @ 2022-01-15 19:38:21
mid=(l+r)>>1
l=mid+1
r=mid-1
by Yukinoshita_Yukino @ 2022-01-15 20:37:36
NOIP跳石头
by LongDouble @ 2022-01-15 20:44:48
```cpp
int find_ans(){
int l=1,r=n;
while(l+1<r){
int mid=(l+r)>>1;
if(check(mid))l=mid;
else r=mid;
}
if(check(l))return l;
if(check(r))return r;
return -1;
}
```
by LaDeX @ 2022-01-15 20:54:02