#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define io ios_base::sync_with_stdio(0),cin.tie(0);
#define str string
#define db double
using namespace std;
const int maxn=1e6+2;
int t, n , a[maxn] , que , m ,aa[103][103],b,sum , y[maxn] , x[maxn];
int ioioioio(){
map <int , int > yy , xx;
for(int i = 1 ; i <= n ; i++){
for(int j = i + 1; j <= m; j++){
yy[y[j] - y[i]]++;
}
}
for(int i = 1 ; i <= m ; i++){
for(int j = i + 1 ; j <= m ; j++){
xx[x[j] - x[i]]++;
}
}
for(auto i : yy){
if(xx.count(i.first)){
sum += i.second * xx[i.first];
}
}
return sum ;
}
signed main() {
io;
cin >> n >> m;
for(int i = 1; i <= n ; i++){
cin >> x[i];
}
for(int i = 1 ; i <= m ; i++){
cin >> y[i];
}
cout << ioioioio();
}
///////////
