hdu 1212(数学)

/*
  Name: 数学题 
  Author: Try_86
  Date: 10/04/12 20:56
*/

#include <cstdio>
#include <cstring>
#include <iostream>

using namespace std;

int b;
char a[1005];

int solve() {
    int ans = 0;
    for (int i=0; a[i]; ++i) ans = (ans * 10 + a[i] - '0') % b;
    return ans;    
}

int main() {
    while (scanf("%s%d", a, &b) != EOF) {
        int ans = solve();
        printf ("%d\n", ans);
    }
    return 0;
}