First Snippets

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a[3];
  \!h  int count = 0;
    int d;
    for (int i = 0; i < 3; i++)
        cin >> a[i];

    cin >> d;
    sort(a, a + 3);

    while (1)
    {
        while (a[1] - a[0] < d)
        {
            a[0]--;
            count++;
        }
        while (a[2] - a[1] < d)
        {
            a[2]++;
            count++;
        }
        break;
    }

    cout << count << endl;
}