#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int a, b;
  cin >> a >> b;
  int ans = 1e9;
  for (int x = 0; x < 1000; ++x) {
    for (int y = 0; y < 1000; ++y) {
      if (x + y == 0) continue;
      int p = roundl((long double) (100 * x) / (x + y));
      int q = roundl((long double) (100 * y) / (x + y));
      if (p == a && q == b) ans = min(ans, x + y);
    }
  }
  cout << ans << endl;
  return 0;
}