#!/usr/bin/env python3
import operator
def main():
    h, w, k = map(int, input().split())
    op, *b = input().split()
    b = list(map(int, b))
    if op == '+':
        f = operator.add
    elif op == '*':
        f = operator.mul
    c = 0
    for _ in range(h):
        a_y = int(input())
        c += sum([ f(a_y, b_x) for b_x in b ])
    print(c % k)
if __name__ == "__main__":
    main()