Compilare: user.cpp: In function ‘void BF()’: user.cpp:57:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < s.size(); ++i ) ^ user.cpp:67:17: warning: variable ‘l’ set but not used [-Wunused-but-set-variable] int l = 0; ^ user.cpp:56:12: warning: ‘kj’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ki,kj,ip,jp; ^ user.cpp:56:9: warning: ‘ki’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ki,kj,ip,jp; ^