Compilare: user.cpp: In function ‘int cauta_c(int, int)’: user.cpp:43:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hx[key].size();i++) ^ user.cpp:45:13: warning: unused variable ‘xx’ [-Wunused-variable] int xx=Hx[key][i]._f, yy=Hx[key][i]._s; ^ user.cpp:45:31: warning: unused variable ‘yy’ [-Wunused-variable] int xx=Hx[key][i]._f, yy=Hx[key][i]._s; ^ user.cpp: In function ‘int cauta_l(int, int)’: user.cpp:58:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hy[key].size();i++) ^ user.cpp:60:13: warning: unused variable ‘yy’ [-Wunused-variable] int yy=Hy[key][i]._f, xx=Hy[key][i]._s; ^ user.cpp:60:31: warning: unused variable ‘xx’ [-Wunused-variable] int yy=Hy[key][i]._f, xx=Hy[key][i]._s; ^ user.cpp: In function ‘int main()’: user.cpp:102:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<V.size();j++) ^ user.cpp:108:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<V.size();j++) ^