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Apr 9th, 2020
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C 0.23 KB | None | 0 0
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int func (long long n)
  5. {
  6.     if (n == 0) return 0;
  7.     return (n%10) + func(n/10)-1;
  8. }
  9. int main()
  10. {
  11.     long long n;
  12.     scanf("%lld", &n);
  13.     printf("%d", func(n));
  14.     return 0;
  15. }
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