This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;
int N;
pii p[200005];
vector<int> v;
signed main()
{
cin >> N;
for (int i = 1; i <= N; i++)
{
cin >> p[2 * i - 1].F >> p[2 * i - 1].S >> p[2 * i].F >> p[2 * i].S;
assert(p[2 * i - 1].F == p[2 * i].F);
}
for (int i = 1; i <= N; i++)
v.emplace_back(i);
sort(v.begin(), v.end(), [&](int i1, int i2)
{ return max(p[2 * i1 - 1], p[2 * i1]) < max(p[2 * i2 - 1], p[2 * i2]); });
for (int i = 1; i < N; i++)
cout << max(p[2 * v[i - 1] - 1], p[2 * v[i - 1]]).F << " " << max(p[2 * v[i - 1] - 1], p[2 * v[i - 1]]).S << " " << min(p[2 * v[i] - 1], p[2 * v[i]]).F << " " << min(p[2 * v[i] - 1], p[2 * v[i]]).S << '\n';
}
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