#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n, d;
  cin >> n >> d;


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

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

  REP (i, n) {
    cout << x[i];
    if (i == n-1)
      cout << endl;
    else
      cout << " ";
  }
  
  return 0;
}