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

int A, B;

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

	int ans = 200;
	repi( a, 1, A+1 ) repi( b, 1, 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;
}