w,x,h=map(int,input().split())

q=int(input())

a=[]

c=[]

sco=w*x *h

for i in range(q):

b=list(map(int,input().split()))

a.append(b)

#c=[[[1]*w]*x]*h

c = [[[1 for _ in range(h)] for _ in range(x)] for _ in range(w)]

for ci in range(q):

    for i in range(w):

        for j in range(x):
    
            for k in range(h):
        
                if (
                    (a[ci][0] <= i <= a[ci][3]) and
                    (a[ci][1] <= j <= a[ci][4]) and
                    (a[ci][2] <= k <= a[ci][5]) and
                    (c[i][j][k]!=0)
                   ):
                     sco-=1
                     c[i][j][k]=0

print(sco)

'''4 4 4 1 1 1 1 2 2 2'''

这串python代码按题输入输出都是正确的 但是提交上去全wa