Submission #880427

#	Time	Username	Problem	Language	Result	Execution time	Memory
880427		AkibAzmain	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

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

int construct(std::vector<std::vector<int>> p) {
  int n = p.size();
  std::vector<std::vector<int>> ans (n, vector < int > (n));
  vector < pair < int, int > > dsu (n);
  for (int i = 0; i < n; ++i) dsu[i].first = i, dsu[i].second = 1;
  for (int i = 0; i < n; ++i)
    for (int j = i + 1; j < n; ++j)
      if (p[i][j] == 1)
        {
          int ci = dsu (i).first, cj = dsu (j).first;
          while (dsu[ci].first != -1) ci = dsu[ci].first;
          while (dsu[cj].first != -1) cj = dsu[cj].first;
          if (ci != cj)
            {
              ans[i][j] = ans[j][i] = 1;
              if (dsu[ci].second < dsu[cj].second) swap (ci, cj);
              dsu[cj].first = ci;
              dsu[ci].second += dsu[cj].second;
            }
        }
  for (int i = 0; i < n; ++i)
    for (int j = i + 1; j < n; ++j)
      if (p[i][j] == 0)
        {
          int ci = dsu (i).first, cj = dsu (j).first;
          while (dsu[ci].first != -1) ci = dsu[ci].first;
          while (dsu[cj].first != -1) cj = dsu[cj].first;
          if (ci == cj) return 0;
        }
  build (ans);
  return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:15:26: error: no match for call to '(std::vector<std::pair<int, int> >) (int&)'
   15 |           int ci = dsu (i).first, cj = dsu (j).first;
      |                          ^
supertrees.cpp:17:22: error: 'cj' was not declared in this scope; did you mean 'ci'?
   17 |           while (dsu[cj].first != -1) cj = dsu[cj].first;
      |                      ^~
      |                      ci
supertrees.cpp:18:21: error: 'cj' was not declared in this scope; did you mean 'ci'?
   18 |           if (ci != cj)
      |                     ^~
      |                     ci
supertrees.cpp:30:26: error: no match for call to '(std::vector<std::pair<int, int> >) (int&)'
   30 |           int ci = dsu (i).first, cj = dsu (j).first;
      |                          ^
supertrees.cpp:32:22: error: 'cj' was not declared in this scope; did you mean 'ci'?
   32 |           while (dsu[cj].first != -1) cj = dsu[cj].first;
      |                      ^~
      |                      ci
supertrees.cpp:33:21: error: 'cj' was not declared in this scope; did you mean 'ci'?
   33 |           if (ci == cj) return 0;
      |                     ^~
      |                     ci