#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int main() {
  int N, D;
  cin >> N >> D;
  vector<int> a(N, 0);
  for (int i = 1; i < N; i++) cin >> a[i];
  vector<int> x(N, 0);
  for (int i = 1; i < N; i++) {
    x[i] = x[i - 1] + a[i];
  }
  for (int i = 1; i < N; i++) {
    if (x[i] - x[i - 1] < D) {
      x[i] = x[i - 1] + D;
    }
  }
  for (int i = 0; i < N; i++) cout << x[i] << " \n"[i == N - 1];
  return 0;
}