Compilare: main.cpp: In function 'll brute(std::__cxx11::string)': main.cpp:48:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < s.size(); j ++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:123:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(aux.size() < n - (start + len)) ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:172:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(aux.size() < n + dif && curr) ~~~~~~~~~~~^~~~~~~~~ main.cpp:202:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < aux.size() && ii < n && aux[i] == s[ii]) ~~^~~~~~~~~~~~ main.cpp: In function 'll brute(std::__cxx11::string)': main.cpp:54:1: warning: control reaches end of non-void function [-Wreturn-type] } ^