洛谷香里说丰年，听取 $WA$ 声一片。

各位大佬们帮我看看哪里错了啊QAQ

#include <bits/stdc++.h>
using namespace std;
int w, x, h, q, x1, x2, b1, b2, z1, z2;
int v[25][25][25], ans;
int main(){
	cin >> w >> x >> h >> q;
	for (int i = 1; i <= w; i++){
		for (int j = 1; j <= x; j++){
			for (int k = 1; k <= h; k++)
				v[i][j][k] = 1;
		}
	}
	while (q--){
		cin >> x1 >> b1 >> z1 >> x2 >> b2 >> z2;
		for (int i = x1; i <= x2; i++){
			for (int j = b1; j <= b2; j++){
				for (int k = z1; k <= z2; k++)
				v[i][j][k] = 0;
		}
	}
	for (int i = 1; i <= w; i++)
		for (int j = 1; j <= x; j++)
			for (int k = 1; k <= h; k++)
				ans += v[i][j][k];
	cout << ans;
	return 0;
	}
}

wwwww样例都过了怎么全$WA$了啊啊啊啊啊啊