#include <bits/stdc++.h>

using namespace std;

struct Initializer {
  Initializer() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout << fixed << setprecision(15);
  }
} initializer;

template<typename T> inline T gcd(T t) {
  return t;
}

template<typename T, typename... S> inline T gcd(T t, S... s) {
  return __gcd(t, gcd(s...));
}

template<typename T> inline T lcm(T t) {
  return t;
}

template<typename T, typename... S> inline T lcm(T t, S... s) {
  T l = lcm(s...);
  return t / gcd(t, l) * l;
}

template<typename T> inline T floor(T a, T b) {
  return a / b * b <= a ? a / b : a / b - 1;
}

template<> inline float floor(float a, float b) {
  return floor(a / b) * b <= a ? floor(a / b) : floor(a / b) - 1;
}

template<> inline double floor(double a, double b) {
  return floor(a / b) * b <= a ? floor(a / b) : floor(a / b) - 1;
}

template<> inline long double floor(long double a, long double b) {
  return floor(a / b) * b <= a ? floor(a / b) : floor(a / b) - 1;
}

template<typename T> inline T ceil(T a, T b) {
  return floor(a + b - 1, b);
}

template<typename T> inline T round(T a, T b) {
  return floor(a + b / 2, b);
}

template<typename T> inline T mod(T a, T b) {
  return a - floor(a, b) * b;
}

template<typename T> inline T factorial(T n) {
  return n <= 1 ? 1 : factorial(n - 1) * n;
}

template<typename T> inline T square(T n) {
  return n * n;
}

template<typename T> inline T cube(T n) {
  return n * n * n;
}

template<typename T> inline T norm(T x1, T y1, T x2, T y2) {
  return square(x1 - x2) + square(y1 - y2);
}

inline long long sqrt(long long n) {
  return sqrt((long double)n);
}

int main() {
  int a, b;
  cin >> a >> b;
  for (int i = 1; ; ++i) {
    for (int j = 0; j <= i; ++j) {
      if (a == round(100 * j, i) && b == round(100 * (i - j), i)) {
        cout << i << endl;
        return 0;
      }
    }
  }
}