Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:55:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= current.size(); i++) ^ user.cpp:26:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (son != father) ^ user.cpp: In function ‘int Solve(int)’: user.cpp:76:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^