Compilare: main.cpp: In function 'int occurrences(std::__cxx11::string, std::__cxx11::string)': main.cpp:12:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int z=0; z<=t.length()-p.length(); z++){ ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=z; i<p.length()+z; i++){ ~^~~~~~~~~~~~~ main.cpp:16:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(t[i]==p[j]){if( (j+1)==p.length()){res++; c+=to_string(z)+' '; break;}else{j++;} } ~~~~~^~~~~~~~~~~~