pe4

#include <stdio.h>

int palindrom(int n)
{
  char str[64] = {0};
  int len = sprintf(str,"%d",n), i;
  for (i=0; i!=len/2; i++) if (str[i] != str[len-i-1]) break;
  return i == len/2;
}

int main()
{
  int a = 1000, b, pal = 0;
  while (--a)
  {
    b = 1000;
    while (--b)
    {
      if (palindrom(a*b) && a*b > pal) pal = a*b;
    }
  }
  printf("%d\n",pal);
  return 0;
}