#include <bits/stdc++.h> #include "supertrees.h" #include <vector> using namespace std; const int maxn = 1e3+10; int construct(vector<vector<int>> p) { int n = p.size(); vector<vector<int>> ans; int u = -1, v = -1; for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) if (p[i][j] == 2) u = i, v = j; if (u == -1) { for (int i = 0; i < n; i++) { vector<int> a; a.resize(n); if (i < n-1) a[i+1] = 1; if (i > 0) a[i-1] = 1; ans.push_back(a); } build(ans); return 1; } }

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:14:14: warning: variable 'v' set but not used [-Wunused-but-set-variable]
   14 |  int u = -1, v = -1;
      |              ^
supertrees.cpp:12:22: warning: control reaches end of non-void function [-Wreturn-type]
   12 |  vector<vector<int>> ans;
      |                      ^~~