#include <bits/stdc++.h>
typedef  long long ll;
#define INF 1000000000
using namespace std;
#define N 1000000
#define MOD 1000000007
int main(void){
    int A,B;
    cin>>A>>B;
    int ans=INF;
    for(int i=0;i<=200;i++){
        for(int j=0;j<=200;j++){
            int sum=i+j;
            if(sum==0)continue;
            double p=(double)100.0*i/(i+j),q=(double)100.0*j/(i+j);
            if(p-(int)p>=0.5){
                p=ceil(p);
            }else{
                p=floor(p);
            }
             if(q-(int)q>=0.5){
                q=ceil(q);
            }else{
                q=floor(q);
            }
            if(A==p and B==q){
                ans=min(ans,sum);
            }
        }
    }   
    cout<<ans<<endl;
}