View Compilation Error

0_0_38807653_8979.cpp: In function 'int main()':
0_0_38807653_8979.cpp:60:25: error: 'c' was not declared in this scope
   60 |                 cin>>n>>c;
      |                         ^
0_0_38807653_8979.cpp:62:25: error: 'v' was not declared in this scope
   62 |                         v[i].clear();
      |                         ^
0_0_38807653_8979.cpp:66:44: error: 'x' was not declared in this scope
   66 |                         fer(j,1,m[i]) cin>>x,v[i].pb(x);
      |                                            ^
0_0_38807653_8979.cpp:66:46: error: 'v' was not declared in this scope
   66 |                         fer(j,1,m[i]) cin>>x,v[i].pb(x);
      |                                              ^