#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int x, y, z, n;
bool ans = 1;

struct node {
	int read, xdm, cyl;
	int zsj;
} a[N];

int main() {
	cin >> x >> y >> n ;
	z = x + y;
	for (int i = 0; i < n; i++) {
		cin >> a[i].read >> a[i].xdm >> a[i].cyl;
		a[i].zsj = a[i].read + a[i].xdm + a[i].cyl;
		if (a[i].zsj < z)
			ans = 0;
	}
	if (ans == 1)
		cout << "Yes\n";
	else
		cout << "No\n";
	return 0;
}