func_code_string: #include <bits/stdc++.h>   using namespace std;   long long arr[166666][6];   multiset<long long> s[6];   signed main() {     long long n;     scanf( %lld , &n);     for (long long i = 1; i <= n; i++) {       for (long long j = 1; j <= 4; j++) {         scanf( %lld , &arr[i][j]);         s[j].insert(arr[i][j]);       }     }     for (long long i = 1; i <= n; i++) {       for (long long j = 1; j <= 4; j++) {         s[j].erase(s[j].find(arr[i][j]));       }       if (*s[1].rbegin() <= *s[3].begin() && *s[2].rbegin() <= *s[4].begin()) {         cout << *s[1].rbegin() <<     << *s[2].rbegin();         return 0;       }       for (long long j = 1; j <= 4; j++) {         s[j].insert(arr[i][j]);       }     }     return 0;   }   