n,m,k=map(int,input().split())
ab=[input().split() for _ in range(m)]
op=ab[0].pop(0)
a,b=ab.pop(0),[i[0] for i in ab]
ans=0
for i in range(m):
    for j in range(n):
        ans+=eval(a[i]+op+b[j])%k
print(ans%k)