Compilare: main.cpp: In function 'void z_function()': main.cpp:22:19: warning: comparison of integer expressions of different signedness: '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:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | while(i + z[i] < s.size() && s[i + z[i]] == s[z[i]]) { | ~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i = 0; i < ans.size(); i++) { | ~~^~~~~~~~~~~~