Compilare: main.cpp: In function 'void solve()': main.cpp:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 1; i < a.length(); i++) { | ~~^~~~~~~~~~~~ main.cpp:23:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while (i + z[i] < a.length() && a[z[i]] == a[i + z[i]]) | ~~~~~~~~~^~~~~~~~~~~~ main.cpp:34:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 1; i < a.length(); i++) { | ~~^~~~~~~~~~~~