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

int main() {
  int64_t n, d;
  cin >> n >> d;
  vector<int64_t> a(n);
  a[0] = 0;
  for (int64_t i = 1; i < n; i++) cin >> a[i];
  vector<int64_t> ans = {0};
  for (int64_t i = 1; i < n; i++) ans.emplace_back(ans.back() + a[i]);
  for (int64_t i = 1; i < n; i++) if (ans[i] - ans[i-1] < d) ans[i] = ans[i - 1] + d;
  for (const auto &p : ans) cout << p << (&p == &ans.back() ? '\n' : ' ');
  return 0;
}