#include<iostream>
using namespace std;
int main()
{
	bool TiJi[21][21][21];
	short w,x,h,q,x1,x2,y1,y2,z1,z2;
	short i,j,k,l;
	cin >> w >> x >> h >> q;
	for(i = 0;i < w;i++)
	for(j = 0;j < x;j++)
	for(k = 0;k < h;k++)
	TiJi[i][j][k] = 0;
	for(i = 0;i < q;i++)
	{
		cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2;
		for(j = x1;j <= x2;j++)
		for(k = y1;k <= y2;k++)
		for(l = z1;l <= z2;l++)
		TiJi[j][k][l] = 1;
	}
	q = 0;
	for(i = 0;i < w;i++)
	for(j = 0;j < x;j++)
	for(k = 0;k < h;k++)
	if(TiJi[i][j][k] == 0)
	q++;
	cout << q;
	return 0; 
 }

全WA，求帮助。