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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4. ll tongcs(ll a)
  5. {
  6.     if (a == 0)
  7.         return 0;
  8.     return a % 10 + tongcs(a / 10);
  9. }
  10. int main()
  11. {
  12.     ll x;
  13.     cin >> x;
  14.     cout << tongcs(x);
  15. }
  16.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/oHXgwK
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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