from functools import reduce
from operator import add
from sys import stdin


def main():
    input = lambda: stdin.readline()[:-1]
    N, M, K = map(int, input().split())
    B = input().split()
    A = [int(input()) for _ in [0] * N]

    an = reduce(add, A) % K
    bm = reduce(add, map(int, B[1:])) % K
    if B[0] == '+':
        ans = 0
        for a in A:
            am = (a * M) % K
            ans = (ans + am + bm) % K
    else:
        ans = (an * bm) % K
    print(ans)


main()