#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for( ll i = 0; i < n; i++ )
using ll = long long;

int main() {
	int a, b;
	cin >> a >> b;
	vector<int> va, vb;
	while(a) {
		va.push_back(a % 10);
		a /= 10;
	}
	va.push_back(0);
	while(b) {
		vb.push_back(b % 10);
		b /= 10;
	}
	vb.push_back(0);
	string ans = "Yes";
	int sza = va.size(), szb = vb.size();
	if(sza < szb) ans = "No";
	else {
		rep(i, szb) if(va[i] < vb[i]) ans = "No";
	}
	cout << ans << endl;
}