CSP-J 2021  T1

题目链接：https://www.luogu.com.cn/problem/P7909?contestId=54994

#include
#include
#include
#include
#include
#include<string>
#include
#include
#include
#include
using namespace std;
int n, L, R, ans, LR; 
int main()
{
    cin>>n>>L>>R;
    LR=R-L;
    if(LR >= n )
        ans=n-1;
    else{
        if(L%n + LR >= n)
            ans=n-1;
        else
            ans=L%n + LR;
    }
    cout<<ans;
    return 0;
}