func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int max(long long int a, long long int b) {     if (a > b)       return a;     else       return b;   }   void solve() {     vector<pair<int, int> > points;     vector<int> xval, yval;     for (int i = 0; i < 3; i++) {       int x, y;       cin >> x >> y;       points.push_back({x, y});       xval.push_back(x);       yval.push_back(y);     }     sort(xval.begin(), xval.end());     sort(yval.begin(), yval.end());     pair<int, int> med = {xval[1], yval[1]};     set<pair<int, int> > ans;     for (int i = 0; i < 3; i++) {       int x = points[i].first;       int y = points[i].second;       ans.insert({x, y});       if (x >= med.first) {         while (x != med.first) {           ans.insert({--x, y});         }       } else {         while (x != med.first) {           ans.insert({++x, y});         }       }       if (y >= med.second) {         while (y != med.second) {           ans.insert({x, --y});         }       } else {         while (y != med.second) {           ans.insert({x, ++y});         }       }     }     cout << ans.size() << endl;     for (auto c : ans) {       cout << c.first <<     << c.second << endl;     }   }   int main() { solve(); }   