#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<bitset>
#include<vector>
#include<deque>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<cmath>
#include<iomanip>
#include <functional>
using namespace std;
typedef long long ll;
//--------------------------


int main()
{
	int a, b;
	cin >> a >> b;

	int ans = 1;
	while (1) {
		for (int i = 0; i <= ans; i++) {
			double aa = (i * 100.0 / ans) + 0.5;
			double bb = (ans - i) * 100.0 / ans + 0.5;
			if ( (int) aa == a && (int) bb == b) {
				cout << ans << endl;
				return 0;
			}
		}
		ans++;
	}

	return 0;
}