n, m, s = map(int, input().split())
x = input().split()
j = 1
for i in range(len(x) - 1):
    x[j] = int(x[j])
    j += 1
y = [int(input()) for i in range(n)]

sum = 0
if x[0] == "+":
    for i in y:
        for j in range(len(x) - 1):
            sum += i + x[j + 1]
else:
    for i in y:
        ax = ""
        for j in range(len(x) - 1):
            sum += i * x[j + 1]
print(sum % s)