pin.cpp

#include<iostream>
#include<cstdlib>
#include<vector>

#define long long long
#define nln '\n'
#define rtg pair<pair<long, long>, pair<long, long>>

using namespace std;

bool common(const rtg &a, const rtg &b)
{
    if (a.second.first <= b.first.first || a.second.second <= b.first.second)
        return 0;
    if (a.first.first >= b.second.first || a.first.second >= b.second.second)
        return 0;
    return 1;
}

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    cout.tie(0)->sync_with_stdio(0);
    //freopen("pin.inp", "r", stdin);
    long n;
    cin >> n;
    vector<rtg> a(n);
    for (auto &i : a)
        cin >> i.first.first >> i.first.second >> i.second.first >> i.second.second;
    // Process
    long ans = 0;
    for (long i = 0; i < n; ++i)
        for (long j = i+1; j < n; ++j)
            if (common(a[i], a[j]))
                ++ans;
    cout << ans << nln;
    return 0;
}