#include <bits/stdc++.h>

int main() {
  int x; scanf("%d", &x);
  int y; scanf("%d", &y);

  for(int t = 1; t <= 200; ++t) {
    for(int a = 0; a <= t; ++a) {
      int b = t - a;
      if( (200 * a + (a + b)) / (2 * (a + b)) == x and (200 * b + (a + b)) / (2 * (a + b)) == y ) {
        printf("%d\n", t);
        return 0;
      }
    }
  }
  
  return 0;
}