/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.06.26 00:01:57
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

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