#include using namespace std; #ifdef LOCAL #include "settings/debug.cpp" #define _GLIBCXX_DEBUG #else #define Debug(...) void(0) #endif #define rep(i, n) for (int i = 0; i < (n); ++i) using ll = long long; using ull = unsigned long long; int main() { string s; cin >> s; int ans = 0; for (char c : s) { if (c == '0') ans += 10; else ans += c - '0'; } cout << ans << endl; return 0; }