N, M, K = map(int, input().split())
op, *B = input().split()
B = list(map(int, B))
A = [int(input()) for _ in range(N)]

S = sum(B)

res = 0

if op == '+':
    for i in range(N):
        res += A[i] * M + S
        res %= K
else:
    for i in range(N):
        res += A[i] * S
        res %= K

print(res)