不能暴力吧
by hecc @ 2022-10-20 13:36:35
```cpp
#include<iostream>
#include<cstdio>
using namespace std;
long long n,l,r;
int main(){
cin>>n>>l>>r;
if(l/n==r/n){
cout<<r%n;
}
else cout<<n-1;
}
```
数学推一下就好啦
by hecc @ 2022-10-20 13:39:21
```cpp
#include<bits/stdc++.h>
using namespace std;
long long n,L,R,mid,maxx;
signed main()
{
cin>>n>>L>>R;
while(L<=R)
{
mid=(L+R)/2;
if(mid%n>=maxx)
maxx=mid%n,L=mid+1;
else
R=mid-1;
}
cout<<maxx;
return 0;
}
```
by VoldemortSZzqq @ 2022-10-22 20:33:45
@[hecc](/user/250590) @[VoldemortSMBH](/user/556217) 谢谢A了
by Zouzhuoxuan @ 2022-11-06 09:44:42