Compilare: main.cpp: In function 'int main()': main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0; i < t.size(); i++) | ~~^~~~~~~~~~ main.cpp:38:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i = pi[t[t.size() - 1]] + 1; i < t.size(); i++) | ~~^~~~~~~~~~