#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef complex<double> P;
typedef pair<int,int> pii;
#define REP(i,n) for(ll i=0;i<n;++i)
#define REPR(i,n) for(ll i=1;i<n;++i)
#define FOR(i,a,b) for(ll i=a;i<b;++i)

#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()

#define MOD (ll)(1e9+7)
#define ADD(a,b) a=((a)+(b))%MOD
#define FIX(a) ((a)%MOD+MOD)%MOD

int main(){
  int A,B;
  cin>>A>>B;
  int sum = 1;
  while(true){
    REP(a,sum+1){
      int b = sum-a;
      int ta = (int)(100*a/(float)(a+b)+0.5f);
      int tb = (int)(100*b/(float)(a+b)+0.5f);
      if(A==ta && B==tb){
        cout<<sum<<endl;
        return 0;
      }
    }
    ++sum;
  }
  return 0;
}