#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int main() {
	int a, b;
	cin >> a >> b;
	
	int ans = INF;
	
	REP(i, 10001) REP(j, 10001) {
		if (i + j == 0) continue;
		
		int A = (double)(100 * i) / (i + j) + 0.5;
		int B = (double)(100 * j) / (i + j) + 0.5;
		
		if (A == a && B == b) chmin(ans, i + j);
	}
	
	cout << ans << endl;
	
	return 0;	
}