n, m, k = map(int,input().split())
s = input().split()
op = s[0]
b = list(map(int, s[1:]))
sb = sum(b)%k
ans = 0
for _ in range(n):
    if op == '+':
        ans += (int(input())*m+sb)%k
    else:
        ans += int(input())*sb%k
print(ans%k)