Compilare: main.cpp: In function 'void checkRed()': main.cpp:81:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int next: red[node]) ^~~ main.cpp:83:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fout << '\n'; ^~~~ main.cpp: In function 'void solve()': main.cpp:113:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cycle.size() < 2*n){ ~~~~~~~~~~~~~^~~~~