#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)

int main()
{
	int A, B; cin >> A >> B;

	rep(sum, 1, 10000)
	{
		rep(a, 0, sum+1)
		{
			int b = sum - a;

			double AA = 100.0 * (double)a / (double)sum;
			int AAA = AA + 0.5;

			double BB = 100.0 * (double)b / (double)sum;
			int BBB = BB + 0.5;

			if (A == AAA && B == BBB)
			{
				cout << sum << endl;
				return 0;
			}
		}
	}
}