#include <bits/stdc++.h>
using namespace std;

int main() {
  int n, d;
  cin >> n >> d;

  vector<int> a(n);
  a[0] = 0;
  int pre = 0;
  for (int i = 1; i < n; ++i) {
    cin >> a[i];
    a[i] += pre;
    pre = a[i];
  }

  for (int i = 1; i < n; ++i) {
    int dist = a[i - 1] + d;
    if (a[i] < dist) {
      a[i] = dist;
    }
  }

  for (int i = 0; i < n; ++i) {
    cout << a[i];
    if (i == n - 1) puts("");
    else cout << " ";
  }
  return 0;
}