Compilare: main.cpp: In function 'void z_function(const std::vector<int>&, std::vector<int>&)': main.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i = 2; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp:19:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | while (i + z[i] < v.size() && v[i - l + 1] == v[i + 1]) | ~~~~~~~~~^~~~~~~~~~