Compilare: main.cpp: In function 'void dfs(long long int)': main.cpp:21:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll i = 0; i < a[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:21:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(ll i = 0; i < a[node].size(); i++) ^~~ main.cpp:36:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(a[node].size() == 0) ^~