#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    int n, d;
    cin >> n >> d;
    vector<int> a(n);
    a[0] = 0;
    for(int i=1; i<n; ++i) {
        cin >> a[i];
        a[i] += a[i-1];
    }
    for(int i=0; i<n; ++i) {
        if (i) {
            a[i] = max(a[i], a[i-1]+d);
            cout << " ";
        }
        cout << a[i];
    }
    cout << endl;
}