#include<bits/stdc++.h>

using namespace std;
using ll = long long;

template<class T> ostream& operator<<(ostream& os, const vector<T> arr){ for(int i = 0; i < (int)arr.size(); i++)cout << arr[i] << (i == (int)arr.size() -1 ? "" : " "); return os;}

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

    for(int i = 1; i < n; i++) {
        a[i] += max(0, d - (a[i] - a[i - 1]));
    }
    cout << a << endl;
}