View Code of Problem 3495

#include<stdio.h>
#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>
#include<cmath>
#include<stack>
using namespace std;


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