Compilare: user.cpp: In function ‘void init()’: user.cpp:59:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,k; ^ user.cpp:59:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k; ^ user.cpp:59:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k; ^ user.cpp: In function ‘void BF(int, int)’: user.cpp:84:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<v[k].size(); ++i) ^ user.cpp:73:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,urm,T; ^