#include "supertrees.h" #include <bits/stdc++.h> using namespace std; int construct(vector<vector<int> > P) { int N=P.size(); bool subtask1=1, subtask2=1; for (int i=0; i<N; i++) { for (int j=0; j<N; j++) { if (P[i][j]==0 || P[i][j]==2 || P[i][j]==3) subtask1=0; if (P[i][j]==2 || P[i][j]==3) subtask2=0; } } vector<vector<int> > ans; vector<int> tmp; if (subtask1) { tmp.push_back(0); for (int i=1; i<N; i++) tmp.push_back(1); ans.push_back(tmp); for (int i=1; i<N; i++) { tmp.clear(); tmp.push_back(1); for (int j=1; j<N; j++) tmp.push_back(0); ans.push_back(tmp); } build(ans); return 1; } else { } }

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:7:19: warning: variable 'subtask2' set but not used [-Wunused-but-set-variable]
    7 |  bool subtask1=1, subtask2=1;
      |                   ^~~~~~~~
supertrees.cpp:18:23: warning: control reaches end of non-void function [-Wreturn-type]
   18 |  vector<vector<int> > ans;
      |                       ^~~