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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int TheNumberOfDigits(int n)//Количество цифр в числе
  5. {
  6. 	int i=1;
  7.     while ((n/=10)>0)
  8.     {
  9.     	i++;
  10.     }
  11.     return i;
  12. }
  13.  
  14. int sc(int a) //Сумма цифр числа
  15. {
  16. 	int sum = 0;
  17. 	while (a/1>0)
  18. 	{
  19. 		sum+=a%10;
  20. 		a/=10;
  21. 	}	
  22. 	return sum;
  23. }
  24.  
  25. int main()
  26. {
  27. 	int n, v, t, x, a;
  28. 	cin>>n;
  29. 	a=10;
  30. 	unsigned int b=100;
  31. 	t=TheNumberOfDigits(n);
  32. 	x=n;
  33. 	for (int i=1;i<t;i++)
  34. 	{
  35. 		v=(n/b)*b+(n%b/a-1)*a+a-1;
  36. 		if (sc(v)>sc(x))
  37. 			x=v;
  38. 		a*=10;
  39. 		b*=100;
  40. 	}
  41. 	cout<<x<<endl;
  42. 	return 0;
  43. }
Success #stdin #stdout 0s 3416KB
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2147483647
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https://ideone.com/ttm3nL
e-olymp.474.Максимум
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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