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

sum = 0
if x[0] == "+":
    sum = m * sum(y) + n * sum(x[1:])
else:
    sum = sum(x[1:]) * sum(y)
print(sum % s)