#include<bits/stdc++.h> using namespace std; vector<int> ans; vector<int> v[41]; void rec(int u, int w) { ans.push_back(w); for(int i = 0; i < v[w].size(); i++) { if(v[w][i]!=u){ rec(w, v[w][i]); ans.push_back(v[w][i]); } } } vector<vector<int>> create_map(int N, int M, vector<int> A, vector<int> B){ if(m==0) { vector<vector<int>> v1(1, vector<int>(1,1)); return v1; } for(int i = 0; i<=40; i++) v[i].clear(); for(int i = 0; i < M; i++) { v[A[i]].push_back(B[i]); v[B[i]].push_back(A[i]); } rec(0, 1); int n = ans.size(); vector<vector<int>> ans1(n, vector<int>(n)); for(int i = 0; i < ans.size(); i++) { for(int j = 0; j < ans.size(); j++){ ans1[i][j] = ans[j]; } } return ans1; }

worldmap.cpp: In function 'std::vector<std::vector<int> > create_map(int, int, std::vector<int>, std::vector<int>)':
worldmap.cpp:16:8: error: 'm' was not declared in this scope
   16 |     if(m==0) {
      |        ^