Compilare: user.cpp: In function ‘void g_setParents(int)’: user.cpp:46:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < A[x].size(); i++) { ^ user.cpp: In function ‘void set_dfsPos(int, int)’: user.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < A[x].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:95:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, a, b, c; ^