Main.cc: In function 'int main()':
Main.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin>>n>>m;
      |     ^~~
Main.cc:4:5: error: 'vector' was not declared in this scope
    4 |     vector<pair<char,vector<int>>> vec;
      |     ^~~~~~
Main.cc:4:12: error: 'pair' was not declared in this scope
    4 |     vector<pair<char,vector<int>>> vec;
      |            ^~~~
Main.cc:4:17: error: expected primary-expression before 'char'
    4 |     vector<pair<char,vector<int>>> vec;
      |                 ^~~~
Main.cc:9:9: error: 'vec' was not declared in this scope
    9 |         vec.push_back({s,{a,b,c}});
      |         ^~~
Main.cc:11:14: error: 'vec' was not declared in this scope
   11 |         sort(vec.begin(),vec.end(),compare);
      |              ^~~
Main.cc:11:36: error: 'compare' was not declared in this scope
   11 |         sort(vec.begin(),vec.end(),compare);
      |                                    ^~~~~~~
Main.cc:11:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   11 |         sort(vec.begin(),vec.end(),compare);
      |         ^~~~
      |         short
Main.cc:14:17: error: 'cout' was not declared in this scope
   14 |                 cout<<i.first<<endl;
      |                 ^~~~
Main.cc:14:32: error: 'endl' was not declared in this scope
   14 |                 cout<<i.first<<endl;
      |                                ^~~~
Main.cc:17:13: error: 'cout' was not declared in this scope
   17 |             cout<<i.first<<' ';
      |             ^~~~