Compilare: main.cpp: In function 'int main()': main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i=1;i<S.size();++i){ | ~^~~~~~~~~ main.cpp:25:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while (i+mnch[i]+1<S.size() and i-mnch[i]-1>=1 and S[i+mnch[i]+1]==S[i-mnch[i]-1]){ | ~~~~~~~~~~~^~~~~~~~~ main.cpp:33:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while (i+mnch[i]+1<S.size() and i-mnch[i]-1>=1 and S[i+mnch[i]+1]==S[i-mnch[i]-1]){ | ~~~~~~~~~~~^~~~~~~~~ main.cpp:40:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i=1;i<S.size();++i){ | ~^~~~~~~~~