Compilare: main.cpp: In function 'void adauga(std::__cxx11::string)': main.cpp:27:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,nda=n0;i<cv.size();i++){ ~^~~~~~~~~~ main.cpp: In function 'void sterge(std::__cxx11::string)': main.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,nda=n0;i<cv.size();i++){ ~^~~~~~~~~~ main.cpp: In function 'int nraparitii(std::__cxx11::string)': main.cpp:49:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,nda=n0;i<cv.size();i++) nda=nda->fiu[cv[i]-'a']; ~^~~~~~~~~~ main.cpp: In function 'int sufmaxcom(std::__cxx11::string)': main.cpp:55:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,nda=n0;i<cv.size();i++){ ~^~~~~~~~~~