// yukicoder 338 (http://yukicoder.me/problems/814)
#include<cstdio>
#include<algorithm>
#define rep(i,a) for(int i=0;i<(a);++i)

int A, B;

int main()
{
	scanf( "%d%d", &A, &B );

	int ans = 200;
	rep( a, A+1 ) rep( b, B+1 )
	{
		int s = a+b;

		if( A == int(100.0*a/s+0.5) && B == int(100.0*b/s+0.5) )
			ans = std::min( ans, s );
	}

	printf( "%d\n", ans );

	return 0;
}