h, w, k = map(int, input().split())


t = input().split()
ope, X = t[0], list(map(int, t[1:]))
Y = [int(input()) for i in range(h)]

sm = 0
X_pre = sum(X)
for y in Y:
    if ope == "+":
        sm = (sm + y * w + X_pre) % k
    else:
        sm = (sm + y * X_pre) % k

print(sm)