//#include "worldmap.h" #include <bits/stdc++.h> using namespace std; vector <int> v; void dfs ( int u, int v, vector <vector<int>> adj ) { v.push_back( v ); for ( auto x : adj[v] ) { if ( x != u ) { dfs( v, x, adj ); v.push_back( v ); } } return; } vector < vector <int> > create_map(int N, int M, vector<int> A, vector<int> B) { vector< vector <int> > answer( N ); vector< vector <int> > adj( N + 1 ); for ( int i = 0; i < M; i++ ) { adj[A[i]].push_back( B[i] ); } dfs( 0, 1, adj ); for ( int i = 0; i < N; i++ ) { answer[i] = v; } return answer; }

worldmap.cpp: In function 'void dfs(int, int, std::vector<std::vector<int> >)':
worldmap.cpp:10:11: error: request for member 'push_back' in 'v', which is of non-class type 'int'
   10 |         v.push_back( v );
      |           ^~~~~~~~~
worldmap.cpp:18:27: error: request for member 'push_back' in 'v', which is of non-class type 'int'
   18 |                         v.push_back( v );
      |                           ^~~~~~~~~