Compilare: main.cpp: In function 'int32_t main()': main.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:26:58: warning: comparison of integer expressions of different signedness: 'int64_t' {aka 'long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | while(s[i+mana[i]+1]==s[i-mana[i]-1]&&i+mana[i]+1<s.size())mana[i]++; | ~~~~~~~~~~~^~~~~~~~~