#include <cmath>
#define REP(i,n) for(int i=0; i<(int)(n); i++)

#include <cstdio>
inline int getInt(){ int s; scanf("%d", &s); return s; }

#include <set>

using namespace std;

int main(){
  const int a = getInt();
  const int b = getInt();

  int ans = 10000000;
  REP(i,10001) REP(j,10001) if(i + j){
    if((int)floor(0.5 + (100. * i) / (i + j)) == a &&
       (int)floor(0.5 + (100. * j) / (i + j)) == b){
      ans = min(ans, i + j);
    }
  }

  printf("%d\n", ans);

  return 0;
}