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using System; | |
namespace ProjectEuler | |
{ | |
class Problem_4 | |
{ | |
/* | |
* A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99. | |
* | |
* Find the largest palindrome made from the product of two 3-digit numbers. | |
*/ | |
public static void Run() | |
{ | |
int multiple_1 = 100; | |
int multiple_2 = 100; | |
long largest = 0; | |
while (multiple_1 < 1000) | |
{ | |
while (multiple_2 < 1000) | |
{ | |
if (isPallindromic(multiple_1 * multiple_2) | |
largest = multiple_1 * multiple_2; | |
multiple_2++; | |
} | |
multiple_1++; | |
} | |
Console.WriteLine(largest); | |
Console.ReadKey(); | |
} | |
private static bool isPallindromic(int number) | |
{ | |
string num = number.ToString(); | |
string reverse = ""; | |
for (int index = num.Length - 1; index > -1; index--) | |
reverse += num[index]; | |
if (num == reverse) | |
return true; | |
return false; | |
} | |
} | |
} |
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