Submission #229369

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Source Code Expand

#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define CLR(a) memset((a), 0 ,sizeof(a))
#define REP(i,n) for(int i = 0; i < (int)(n); ++i)
#define SZ(a) int((a).size())
#define PB push_back
#define MP make_pair

typedef pair<long, long> PLL;


int main(){
	int a,b;
	cin>>a>>b;
	int res=a%b;
	
	if(res!=0)cout<<b-res<<endl;
	else cout<<"0"<<endl;
	return 0;
}

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