Compilare: user.cpp: In function ‘void solve1()’: user.cpp:25:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( v[i].size() > L || ( v[i].size() == L && mic(v[i], v[imax]) == true ) ) ^ user.cpp:25:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( v[i].size() > L || ( v[i].size() == L && mic(v[i], v[imax]) == true ) ) ^ user.cpp: In function ‘bool subsir(std::string, std::string)’: user.cpp:37:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < a.size() && j < b.size() ) ^ user.cpp:37:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < a.size() && j < b.size() ) ^ user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( j == b.size() ) return true; ^ user.cpp: In function ‘bool mic(std::string, std::string)’: user.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool subsir(std::string, std::string)’: user.cpp:43:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void solve1()’: user.cpp:31:17: warning: ‘imax’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<v[imax]; ^