n,m,k=map(int,input().split())
l=list(map(str,input().split()))
a=[int(input()) for _ in range(n)]
b=[]
for i in range(1,m+1):
    b.append(int(l[i]))
A=sum(a)
B=sum(b)
if l[0]=='+':
    ans=0
    for i in a:
        ans+=i*m+B
        ans%=k
else:
    ans=0
    for i in a:
        ans+=i*B
        ans%=k
print(ans)