#include <iostream>

using namespace std;

int main() {
	int aPercent, bPercent;
	cin >> aPercent >> bPercent;
	int sum;
	for (sum = 1;; ++sum) {
		int a;
		for (a = 0; a <= sum; ++a) {
			int b = sum - a;
			int x = ((1000 * a) / sum + 5) / 10;
			int y = ((1000 * b) / sum + 5) / 10;
			if (x == aPercent && y == bPercent) {
				break;
			}
		}
		if (a <= sum) {
			break;
		}
	}
	cout << sum << endl;
	return 0;
}