Compilare: main.cpp: In function 'void z_alg(std::__cxx11::string, int*)': main.cpp:15:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2 ; i < sir.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i + z1[i] <= sir.size() and sir[z1[i]+1] == sir[i + z1[i]]) ~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i + z1[i] <= sir.size() and sir[z1[i]+1] == sir[i + z1[i]]) ~~~~~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = pattern.size() + 1; i < sirrev.size() ; ++ i) ~~~^~~~~~~~~~~~~~~ main.cpp:68:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= (pattern.size()/2) ; ++ i) ~~^~~~~~~~~~~~~~~~~~~~~