Compilare: main.cpp: In function 'void zz(std::__cxx11::string)': main.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1; k<a.length(); k++) ~^~~~~~~~~~~ main.cpp: In function 'void srch(std::__cxx11::string, std::__cxx11::string)': main.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<res.length(); i++) ~^~~~~~~~~~~~~ main.cpp:59:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=pattern.length() && z[i]>=pattern.length()) ~^~~~~~~~~~~~~~~~~~ main.cpp:59:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=pattern.length() && z[i]>=pattern.length()) ~~~~^~~~~~~~~~~~~~~~~~