View Code of Problem 3495

#include<stdio.h>
#include<math.h>
#include<string.h>
#include<stdlib.h>
#include<iostream>
#include<algorithm>
//#include <bits/stdc++.h>
using namespace std;


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