1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
// Tadeusz Bindas
#include <iostream>
int main() {
    int n, k, sum = 0, tmp;
    std::cin >> n >> k;
    int* a = new int[n];
    for (int i = 0; i < n; i++)
    {
        std::cin >> tmp;
        a[i] = tmp;
    }

    for (int i = 0; i < n; i++)
    {

        if (i > 0 && a[i-1] > a[i])
        {
            if (a[i] - a[i - 1] > k)
            {
                tmp = a[i] - a[i - 1] - k;
                a[i] += tmp;
                sum += tmp;
            }
            else if (a[i - 1] - a[i] > k)
            {
                tmp = a[i - 1] - a[i] - k;
                a[i] += tmp;
                sum += tmp;
            }
        }
        if (i < n - 1 && a[i + 1] > a[i])
        {
            if (a[i] - a[i + 1] > k)
            {
                tmp = a[i] - a[i + 1] - k;
                a[i] += tmp;
                sum += tmp;
                i = -1;
            }
            else if (a[i + 1] - a[i] > k)
            {
                tmp = a[i + 1] - a[i] - k;
                a[i] += tmp;
                sum += tmp;
                i = -1;
            }
            
        }
    }
    std::cout << sum << std::endl;
    delete[] a;
    return 0;
}