#include <iostream>
#include <cstdlib>
#include <math.h>
using namespace std;
int main(){
	int ar,br;
	cin>>ar>>br;
	double rar,rbr;
	int car,cbr;
	int ap,bp;
	int tmp,ans;
	ans=200;
	//aを設定
	for(double i=0;i<=100;i++){
		//bを設定
		for(double k=0;k<=100;k++){
			if(i!=0||k!=0){
				rar=(100*i)/(i+k);
				rbr=(100*k)/(i+k);
				car=round(rar);
				cbr=round(rbr);
				if(car==ar&&cbr==br){
					tmp=i+k;
					if(tmp<ans)ans=tmp;
				}
			}
		}
	}
	cout<<ans<<endl;
}