Codeforces 1114A Got Any Grapes?

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#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <math.h>
#include <string>
#include <algorithm>
#include <vector>

using namespace std;

int x, y, z;
int a, b, c;

int main() {
	scanf("%d %d %d", &x, &y, &z);
	scanf("%d %d %d", &a, &b, &c);
	a -= x;
	if (a < 0) {
		printf("NO\n");
	}
	else {
		int s = a + b;
		s -= y;
		if (s < 0) {
			printf("NO\n");
		}
		else {
			int w = s + c;
			w -= z;
			if (w < 0) {
				printf("NO\n");
			}
			else {
				printf("YES\n");
			}
		}
	}
	//system("pause");
	return 0;
}