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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     int  greatest = 0;
  7.  
  8.     for(int i = 999;i>=100; --i)
  9.     {
  10.         for (int j =990, product; j>=100 && ((product = i*j) > greatest); j-=11)
  11.         {
  12.             int n = product;
  13.             int rev = 0;
  14.             do
  15.             {
  16.                 rev = (rev * 10) + (product % 10);
  17.                 product /= 10;
  18.             } while(product != 0);
  19.  
  20.             if (n == rev)
  21.             {
  22.                 cout << "Palindrome : " << i << " * " << j << " = " << n << endl;
  23.                 greatest = n;
  24.             }
  25.         }
  26.     }
  27.     cout << "The Greatest Palindrome Number Is : " << greatest << endl;
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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Palindrome : 995 * 583 = 580085
Palindrome : 993 * 913 = 906609
The Greatest Palindrome Number Is : 906609
https://ideone.com/qcFby6
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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