This code works well in my computer but codechef submission shows wrong

1

This code works well in my computer but codechef submission shows it as wrong.
I am new to codechef. please help me where am I doing wrong, this is the question:

t=int(input())
count=[]
for i in range(t):
    n,m=map(int,input().split())
    x,y,s=map(int,input().split())
    hor=[]
    ver=[]
    if(x!=0):
        hor=input().split()
        hor=[int(i) for i in hor]
    if(y!=0):
        ver=input().split()
        ver=[int(i) for i in ver]
    hor.append(n+1)
    ver.append(m+1)
    x=0
    k1=0
    for i in hor:
        k2=0
        for j in ver:
            x+=(int(i-k1-1)/s)*int((j-k2-1)/s)
            k2=j
        k1=i
    count.append(x)
for i in count:
    print(int(i))