Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[node].size();++i) ^ user.cpp: In function ‘int findH(int, int)’: user.cpp:74:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < iH[crt][line].size() ; ++i) ^ user.cpp: In function ‘int query(int)’: user.cpp:129:13: warning: unused variable ‘j1’ [-Wunused-variable] int i , j1 , j2 , k , f; ^ user.cpp:129:18: warning: unused variable ‘j2’ [-Wunused-variable] int i , j1 , j2 , k , f; ^ user.cpp:129:23: warning: unused variable ‘k’ [-Wunused-variable] int i , j1 , j2 , k , f; ^