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

int main() {
	int a[20][20][20];
	int w, x, h, q, sum = 0;
	cin >> w >> x >> h >> q;
	while (q--) {
		int x1, y1, z1, x2, y2, z2;
		cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2;
		for (int i = x1; i <= x2; i++)
			for (int j = y1; j <=  y2; j++)
				for (int k = z1; k <= z2; k++)
					a[i][j][k] = 1;
	}
	for (int i = 0; i < w; i++)
		for (int j = 0; j < x; j++)
			for (int k = 0; k < h; k++)
				if (a[i][j][k] != 1)
					sum++;
	cout << sum << endl;
	return 0;
}

恳请各位指点错误