lightoj 1163 - Bank Robbery

/**
@author - Rumman BUET CSE'15
Problem - Bank Robbery
Concept - pattern observation.
*/

#include<bits/stdc++.h>
using namespace std ;
#define ll long long
#define fi                                      freopen("in.txt", "r", stdin)
#define fo                                      freopen("out.txt", "w", stdout)

int main()
{
//    fi ;
//    fo ;
    ll T , t = 0 ;
    scanf("%lld",&T);
    while(T--)
    {
        t++ ;
        ll n ;
        ll d , r , s ;
        scanf("%lld",&n);
        d = n ;

        s = 0 ;

        while(d / 10 > 0)
        {
            s = s+d ;
            d = d /10 ;
        }

        ll lo = s - 2000 , hi = s + 2000 ;

        printf("Case %lld:",t);
        for( ll i = lo ; i <= hi ; i++)
        {
            if(i - i/10 == n)
            {
                printf(" %lld",i);
            }
        }

        printf("\n");
    }
    return 0 ;
}