#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
using namespace std;
template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
template<class T> istream& operator , (istream& is, T& val){ return is >> val;}
template<class T> ostream& operator << (ostream& os, vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"\n":" ");return os;}
template<class T> ostream& operator , (ostream& os, T& val){ return os << " " << val;}
template<class T> ostream& operator >> (ostream& os, T& val){ return os << " " << val;}

int main(){
	int A,B;
	cin >> A,B;

	int ans = 1e9;
	for(int a=0; a<=1000; a++){
		for(int b=0; b<=1000; b++){
			if(a==0 && b==0) continue;
			int A_ = ((100.0*a)/(a+b) + 0.5);
			int B_ = (100.0*b)/(a+b) + 0.5;
			if(A_ == A && B_ == B){
				ans = min(ans, a+b);
			}
		}
	}

	cout << ans << endl;
	return 0;
}