Submission #447431

#	Time	Username	Problem	Language	Result	Execution time	Memory
447431		Nodir_Bobiev	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std ;

int construct(std::vector<std::vector<int>> p) {
      int n = p.size();
      vector <vector <int>> ans;
      for(int i = 0; i < n; i ++){
            vector <int> row;
            row.resize(n);
            ans.push_back(row);
      }
      map <int, bool> us;
      for(int i = 0; i < n; i ++){
            if( us[i]  || i == j ) continue;
            for(int j = 0; j < n; j ++){
                if( p[i][j] ){
                    if( us[j] ) return 0;
                    us[j] = 1;
                    ans[i][j] = ans[j][i] = 1;
                }
            }
      }
      build(ans);
      return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:15:32: error: 'j' was not declared in this scope
   15 |             if( us[i]  || i == j ) continue;
      |                                ^