# Challenge : JULY21; Problem Code: XXOORR

Couldn’t able to find a Test Case where my code is not working. Please help me to find where my code is not working also the issue with my approach.

Code:

#include
#include <bits/stdc++.h>
using namespace std;
typedef long long int lli;

int Dec2Bin(lli D2B)
{
if (D2B == 0)
return 0;
else
return (D2B % 2 + 10 * Dec2Bin(D2B / 2));
}

int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);

#ifndef ONLINE_JUDGE
//for getting input from input.txt
freopen(“input.txt”, “r”, stdin);
//for writing output to output.txt
freopen(“output.txt”, “w”, stdout);
#endif

``````lli TC;
lli N, K;
cin >> TC;

while (TC --)
{
cin >> N >> K;
lli i, Ar, Arr[N];
lli Sum, Rem, Ans = 0;

for (i = 0; i < N; i++)
{
cin >> Arr[i];

Ar = Arr[i];
Ar = Dec2Bin(Ar);
Arr[i] = Ar;
}

Sum = accumulate(Arr, Arr + N, 0);
cout << Sum << "\n";

while (Sum != 0)
{
Rem = Sum % 10;
if (Rem == 1)
{
Ans = Ans + 1;;
}
else
{
if (Rem % K == 0)
Ans = Ans + (Rem / K);
else
Ans = Ans + ((Rem / K) + 1);
}
Sum = Sum / 10;
}
cout << Ans << "\n";
}
return 0;
``````

}