Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^ user.cpp: In function ‘void solve(int, int)’: user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^