#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-6;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int A,B;

int f(double x){
	int X=(int)(x*10+eps);
	if(X%10>4) X+=10;
	return X/10;
}

int main(){
	cin>>A>>B;
	int res=inf;
	for(int i=0;i<2000;i++) for(int j=0;j<2000;j++) if(i+j>0){
		int a=f((double)i/(i+j)*100),b=f((double)j/(i+j)*100);
		if(a==A&&b==B) res=min(res,i+j);
	}
	cout<<res<<endl;
}