//uva11332 #include <iostream> #include <vector> using namespace std; int main() { int a = 0; while (cin >> a && a) { vector<int> v; while (a / 10 != 0) { v.push_back(a % 10); a /= 10; if (a / 10 == 0) { for (int i = 0; i < v.size(); i++) { a += v[i]; } v.clear(); } } cout << a << endl; } return 0; }