Compilare: main.cpp: In function 'int main()': main.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(i=1;i<s.size();i++) | ~^~~~~~~~~ main.cpp:25:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while(s[j]==s[j+i]&&j+i<s.size()) | ~~~^~~~~~~~~