#include<bits/stdc++.h>
using namespace std;

using ll=long long;
const int e5=1e5;
const int e9=1e9;

void readnum(int&n,int l,char s){
	int c=getchar();
	assert('1'<=c&&c<='9');
	n=c-'0';
	while(true){
		c=getchar();
		if(c==s)break;
		assert('0'<=c&&c<='9');
		assert(n*10ll+c-'0'<=l);
		n=n*10+c-'0';
	}
}

ll solve2(int N,int M,int K,int op,vector<int>A,vector<int>B){
	sort(B.begin(),B.end());
	ll z=0;
	for(int i=0;i<N;++i){
		z+=B.end()-lower_bound(B.begin(),B.end(),op=='+'?K-A[i]:(K-1)/A[i]+1);
	}
	return z;
}

int main(){cin.tie(0);ios::sync_with_stdio(false);
	int N,M,K;
	readnum(N,e5,' ');
	readnum(M,e5,' ');
	readnum(K,e9,'\n');
	int op=getchar();
	assert(op=='+'||op=='*');
	int c=getchar();
	assert(c==' ');
	vector<int>A(N),B(M);
	for(int i=0;i<M;++i){
		readnum(B[i],e9," \n"[i==M-1]);
	}
	for(int i=0;i<N;++i){
		readnum(A[i],e9,'\n');
	}
	c=getchar();
	assert(c==-1);
	cout<<solve2(N,M,K,op,A,B)<<"\n";
	return 0;
}