#include <bits/stdc++.h>
using namespace std;
#define REP(i,n,m) for(int i=n;i<m;i++)
#define rep(i,n) REP(i,0,n)
#define EREP(i,n,m) for(int i=n;i<=m;i++)
#define erep(i,n) EREP(i,0,n)

typedef pair<int,int> P;

unsigned int dp[101][101];

int main(void){
  int n; cin>>n;
  vector<P> v(n);
  rep(i,n) cin>>v[i].first>>v[i].second;

  erep(i,n){
    erep(j,n) dp[i][j] = INT_MAX;
    dp[i][i] = 0;
  }

  REP(i,1,n){ //???????±????
    EREP(j,0,n-i){ //????§???????????±????
      REP(k,j,j+i){ //????????????????±????
        int cost = v[j].first * v[k].second * v[k+1].first * v[j+i].second;
        dp[j][j+i] = min(dp[j][j+i],cost+dp[j][k]+dp[k+1][j+i]);
      }
    }
  }

  cout<<dp[0][n-1]<<endl;

  return 0;
}