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  1. using System;
  2. public class Test
  3. {
  4.     public static void Main()
  5.     {
  6.         int sum = 0, num;
  7.         for (int x = 1; x < 100; x++)
  8.         {
  9.             num =  (int)Math.Pow(x, 2) - 81;
  10.             if (num % 100 == 0)
  11.             {
  12.                 Console.WriteLine("x: " + x + " value: " + num);
  13.                 sum += x;
  14.             }
  15.         }
  16.         Console.WriteLine("SUM: " + sum);
  17.     }
  18. }
Success #stdin #stdout 0.02s 33888KB
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stdin
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Standard input is empty
stdout
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x: 9 value: 0
x: 41 value: 1600
x: 59 value: 3400
x: 91 value: 8200
SUM: 200
https://ideone.com/mXoCqZ
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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