Compilare: main.cpp: In function 'int main()': main.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=1; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:19:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(cnt%2==1 && s[i]<s[i-1] && i!=s.size()-1) cnt++; | ~^~~~~~~~~~~~ main.cpp:16:28: warning: variable 'dr' set but not used [-Wunused-but-set-variable] 16 | int cnt=0, maxx=0, dr=0; | ^~ main.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:58:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | if(xsec>=1 && xsec<=s.size()-2) | ~~~~^~~~~~~~~~~~