N,M,K=map(int,input().split())
L=list(input().split())
OP=L[0]
L=L[1:]
for i in range(len(L)):
    L[i]=int(L[i])
L=sum(L)

ans=0
if OP=="+":
    for i in range(N):
        A=int(input())
        ans+=A*M
    ans+=L*N
    print(ans%K)
else:
    for i in range(N):
        A=int(input())
        ans+=A*L
    print(ans%K)