Compilare: user.cpp: In function ‘int bfs()’: user.cpp:52:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^ user.cpp: In function ‘int check(double)’: user.cpp:68:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < v[i].size(); j++ ){ ^ user.cpp:81:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < v[n].size(); j++ ){ ^ user.cpp: In function ‘int main()’: user.cpp:126:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod.second].size(); i++ ){ ^ user.cpp:145:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod.second].size(); i++ ){ ^