#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
	int A,B;
	cin>>A>>B;
	if (A==0 && B==0){
		cout<<0<<endl;
		return 0;
	}
	if (A==0 ||B==0){
		cout<<1<<endl;
		return 0;
	}
	int a=1,b=1;
	for (a=1;a<1000;a++){
		for (b=1;b<1000;b++){
			float A1=((100.0*a)/(a+b)+0.5);
			float B1=((100.0*b)/(a+b)+0.5);
			if ((int)A1==A &&(int)B1==B){
				cout<<a+b<<endl;
				return 0;
			}
		}
	}

	return 0;
}