N, M, K = map(int, input().strip().split(' '))

tmp = input().strip().split(' ')
op = tmp[0]
B = tmp[1:]
A = []
for i in range(N):
  A.append(input().strip())

ans = 0

for y in range(N):
  for x in range(M):
    ans += (eval(A[y] + op + B[x])) % K

print(ans % K)