Compilare: main.cpp: In function 'long long int moda(std::__cxx11::string, long long int)': main.cpp:70:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < num.length(); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:90:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll j=0;j<a[i].size();j++) ~^~~~~~~~~~~~ main.cpp:92:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll j=0;j<v.size();j++){ ~^~~~~~~~~ main.cpp:115:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll i=0;i<v.size();i++) ~^~~~~~~~~