#include <bits/stdc++.h> 
 
using namespace std;  
 
typedef long long ll;  
typedef pair<int, int> ii;  
 
const int INF = 1e9;  
const ll LINF = 1e18;  
 
const int N = 3e3 + 5; 
const int B = 63;    
const int K = 48;    
 
int n;  
ll mask[N][K]; 
 
int nC2(int n) {
	if (n < 2) return 0;  
	return n * (n - 1) / 2; 
}
 
int main() {
	ios::sync_with_stdio(false); 
	cin.tie(nullptr); 	
	cin >> n; 
	for (int x = 0; x < n; x++) {
		string s; cin >> s; 
		for (int y = 0; y < n; y++) {
			int bit_idx = y % B;  
			mask[x][y / B] |= (1ll << bit_idx) * (s[y] - '0');  
		} 
	}
 
	// Giả sử x1, x2 (x1 < x2) là 2 hàng rìa của bảng cần đếm
	ll ans = 0; 
	for (int x1 = 0; x1 + 1 < n; x1++) {
		for (int x2 = x1 + 1; x2 < n; x2++) {
			int cnt = 0;  // Số vị trí cùng bằng 1 của 2 hàng x1, x2
			for (int cid = 0; cid < K; cid++) {
				cnt += __builtin_popcountll(mask[x1][cid] & mask[x2][cid]); 
			}
			ans += nC2(cnt);  
		}
	}
 
	cout << ans << '\n';
}

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NQowMDAxMAoxMTExMQowMDExMAoxMTAwMQowMDAxMA==

5
00010
11111
00110
11001
00010