Compilare: main.cpp: In function 'void z_algorithm(std::__cxx11::string)': main.cpp:10:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1,l=0,r=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:16:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+z[i]<s.size() && s[z[i]]==s[i+z[i]]) ~~~~~~^~~~~~~~~ main.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=a.size()+1;i<s.size();i++) ~^~~~~~~~~ main.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z[i]==a.size()) ~~~~^~~~~~~~~~ main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<rez.size() && i<1000;i++) ~^~~~~~~~~~~