Compilare: user.cpp: In function ‘bool solveNow(const string&, const string&, int, int)’: user.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p1 >= s.size()) return 1; ^ user.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p1>=s.size()) return 1; ^ user.cpp: In function ‘bool solve3(std::string, std::string)’: user.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;p1<s.size()&&p2<act.size(); ++p1) { ^ user.cpp:38:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;p1<s.size()&&p2<act.size(); ++p1) { ^ user.cpp: In function ‘bool solve4(std::string, std::string)’: user.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i){ ^ user.cpp:48:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;p1<s.size()&&p2<act.size()&&bad==0;++p1,++p2){ ^ user.cpp:48:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;p1<s.size()&&p2<act.size()&&bad==0;++p1,++p2){ ^ user.cpp: In function ‘int solve(std::string, std::string)’: user.cpp:62:9: warning: unused variable ‘wherefree’ [-Wunused-variable] int wherefree = Poz(s, '?'), whereDel = Poz(s, '*'); ^