#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
	int a, b;
	int ans = 114514;
	cin >> a >> b;
	
	for( int i = 0; i < 2000; i++ ){
		for( int j = 0; j < 2000; j++ ){
			if( i + j == 0 ) continue;
			int sa = 100.0 * i / (i+j) + 0.5;
			int sb = 100.0 * j / (i+j) + 0.5;
			if( sa == a && sb == b )
				ans = min(ans, i + j);
		}
	}
	cout << ans << endl;
	return 0;
}