N, M, K = [int(x) for x in input().split()]
C = [x for x in input().split()]
B = [int(x) for x in C[1:]]
A = [int(input()) for _ in range(N)]

ans = 0
bs = sum(B)
for j in range(N):
    if C[0] == '+':
        ans += A[j] * M + bs
        ans %= K
    else:
        ans += A[j] * bs
        ans %= K

print(ans % K)