Compilare: main.cpp: In function 'unsigned int cod3(std::__cxx11::string)': main.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.length(); i++) ~~^~~~~~~~~~~~ main.cpp: In function 'bool apartine(int)': main.cpp:32:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val[p] == x){ ~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = l; i < text.length(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:53:9: warning: unused variable 'L' [-Wunused-variable] int L = text.length(); ^