Compilare: main.cpp: In function 'std::vector<int> calc_z(std::string)': main.cpp:17:18: 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=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | while(i+z[i]+1<s.size() && s[i+z[i]+1]==s[z[i]+1]) | ~~~~~~~~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | int elr=(r+1<a.size()?zlr[(r+1)+b.size()]:-1), erl=(l>0?zrl[(a.size()-1)-(l-1)+b.size()]:-1); | ~~~^~~~~~~~~