int iftool(char t)
{
    switch (t) {
    case 0:
        return t = 0;
        break;
    //
    // ...
    //
    case 9:
        return t = 9;
        break;
    case 10:
        return t = 'A';
        break;
    case 11:
        return 'B';
        break;
    case 12:
        return t = ('C');
        break;
    case 13:
        return t = ('D');
        break;
    case 14:
        return t = ('E');
        break;
    case 15:
        return t = ('F');
        break;
    }
}

l=0;
r=1;
m=1;
n=0;
while (l<=k)
{
    n=(n+(number[l]*r));
    if ( m%4==0 || l==k)
    {
        r=1;
        m=1;
        t=n;
        t=iftool(t);
        mas[x]=t;
        n=0;
        printf ("lol-%d",mas[x]);
        x++;
    }
    else
    {
        m++;
        r=r*2;
    }
    l++;
}

#include<iostream>
#include<string>
using namespace std;
int main()
{
       int a[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
       string b[] = {"0","1","2","3","4","5","6","7","8","9"};
string str = "";
int x1,x2;
cin >> x1;
int z[8];
for (int i = 0; i < 8;i++)
{
    x2 = x1/16;
    z[i] = x1 - (x2*16);
    // cout << "x: " << x2 << "t"<< "z: " << z[i]<
    x1 = x2;
}
for (int j = 8, j2 = 0; j > 0; j--,j2++)
{
    for(int n = 0; n < 16; n++)
         if (z[j] == a[n])
         {
               str = str + b[n];
         }
 }
 cout << str;
 cin.get();
 return 0;
}