UVA 12050 - Palindrome Numbers

/******************************************************************
***   Author        : Shipu Ahamed (Psycho Timekiller)          ***
***   E-mail        : [email protected]                   ***
***   University    : BUBT,Dept. of CSE                         ***
***   Team          : BUBT_HIDDEN                               ***
***   Facebook      : http://www.facebook.com/DeesheharaShipu   ***
******************************************************************/

#include 
using namespace std;

typedef  vector vi;

#define ll long long
#define pb push_back

////============ CONSTANT ===============////
#define mx  30
////====================================////

ll pal[mx];

void palindrome()
{
    pal[1]=9;
    pal[2]=9;
    ll range=18;
    for(int len=3;len2000000000)
        break;
    }
}

int main()
{
    palindrome();
    ll n;
    while(scanf("%lld",&n))
    {
        if(n==0) break;
        vi v;
        for(int i=1;i<=mx;i++)
        {
            if(n<=pal[i])
            {
                int m;
                if(i%2)
                    m=(i+1)/2;
                else
                    m=i/2;

                for(int j=0;j=0;l--)
                    v.pb(v[l]);

                break;
            }
            else
                n=n-pal[i];
        }
        int s=v.size();

        for(int i=0;i