Compilare: main.cpp: In function 'void findin(std::__cxx11::string, std::__cxx11::string)': main.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=2;k<s.size();++k) ~^~~~~~~~~ main.cpp:43:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=m+1;i<=st.size()+m+1;++i) ~^~~~~~~~~~~~~~~ main.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z[i]==c.size()) ~~~~^~~~~~~~~~ main.cpp:50:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=m+1;i<=st.size()+m+1;++i) ~^~~~~~~~~~~~~~~ main.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z[i]==c.size()) ~~~~^~~~~~~~~~