#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<P,int> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[4]={-1,0,1,0},dy[4]={0,-1,0,1};

ll gcd(ll a,ll b){
	if(!b) return a;
	return gcd(b,a%b);
}

ll n,m,k;
char c;
vl a,b;

int main(){
	cin>>n>>m>>k>>c;
	a=vl(m);
	b=vl(n);
	for(auto &i:a) cin>>i;
	for(auto &i:b) cin>>i;
	ll res=0;
	map<ll,ll> mp;
	if(c=='+'){
		for(auto i:a) mp[i%k]++;
		for(auto i:b) res+=mp[(k-i%k)%k];
	}
	else{
		for(auto i:a) mp[k/gcd(k,i)]++;
		for(auto p:mp){
			ll t=0;
			for(auto i:b) if(i%p.first==0) t++;
			res+=t*p.second;
		}
	}
	cout<<res<<endl;
}