View Compilation Error

0_0_20331600_25132.cpp: In function 'void solve(int)':
0_0_20331600_25132.cpp:124:24: error: 'n' was not declared in this scope
     for(int i = 1;i <= n;i++)
                        ^
0_0_20331600_25132.cpp:127:17: error: 'Belong' was not declared in this scope
               g[Belong[i]].push_back(Belong[edge[j].to]);
                 ^
0_0_20331600_25132.cpp:130:24: error: 'ans' was not declared in this scope
     for(int i = 0; i < ans.size(); i++)
                        ^