game.cpp: In function 'int add_teleporter(int, int)':
game.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
34 | for(int i=0; i<adj.size(); i++)
| ~^~~~~~~~~~~
game.cpp:37:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | for(int j=0; j<adj.size(); j++)
| ~^~~~~~~~~~~
game.cpp:37:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
37 | for(int j=0; j<adj.size(); j++)
| ^~~
game.cpp:39:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
39 | dfs(i, i);
| ^~~