#include <stdio.h>

void dight(int x,int i)
{
    int n = 1;
    while (i) {
        i--;
        n = n*10;
    }
    printf("%d\n",x%n);
}
int main()
{
    int x,i;
    scanf("%d %d",&x,&i);
    dight(x,i);
    return 0;
}