Compilare: main.cpp: In function 'int kmp(std::string, std::string, int)': main.cpp:20:16: warning: unused variable 'poz' [-Wunused-variable] 20 | int m=b.size(),poz=-1; | ^~~ main.cpp: In function 'int main()': main.cpp:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | while(poz<p1+b.size() && poz!=-1) | ~~~^~~~~~~~~~~~