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NineDigitMagicNumbers.cs
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NineDigitMagicNumbers.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class NineDigitMagicNumbers
{
static void Main()
{
int sum = int.Parse(Console.ReadLine());
int diff = int.Parse(Console.ReadLine());
int resultsCount = 0;
for (int i = 111; i <= 777; i++)
{
int num2 = i + diff;
int num3 = num2 + diff;
if ((IsNumber(i) && IsNumber(num2) && IsNumber(num3) && num3 <= 777)
&& (CalculateDigits(i) + CalculateDigits(num2) + CalculateDigits(num3) == sum))
{
Console.WriteLine("{0}{1}{2}", i, num2, num3);
resultsCount++;
}
}
if (resultsCount == 0)
{
Console.WriteLine("No");
}
}
private static int CalculateDigits(int n)
{
int sum = 0;
while (n > 0)
{
sum += n % 10;
n /= 10;
}
return sum;
}
private static bool IsNumber(int n)
{
string numString = n.ToString();
foreach (var digit in numString)
{
if (digit < '1' || digit > '7')
{
return false;
}
}
return true;
}
}