#include<stdio.h>
#include<string.h>
#include<math.h>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
    int n, m;
    while (~scanf("%d%d", &n, &m))
    {
        int id = 0;
        int tott = 1;
        while (tott<m)
        {
            id++;
            if (id > n - 1) id = 0;
            tott++;
            
        }
        printf("%d\n", id);
    }
    return 0;
}