Compilare: main.cpp: In function 'long long int check(long long int)': main.cpp:28:4: warning: variable 'last' set but not used [-Wunused-but-set-variable] ll last=-1; ^~~~ main.cpp: In function 'int32_t main()': main.cpp:71:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:76:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll i=0;i<v.size();i++){ ~^~~~~~~~~