#include<iostream>
#include<vector>
#define rep(i, n) for(int i = 0; i < n; ++i)
using namespace std;
int main(){
    int n, d;
    cin >> n >> d;
    vector<int> a(n);
    a[0] = 0;
    int ai;
    rep(i, n - 1) {
        cin >> ai;
        a[i + 1] = a[i] + ai;
    }
    rep(i, n - 1) {
        a[i + 1] = max(a[i] + d, a[i + 1]);
    }
    rep(i, n) {
        cout << a[i] << (i != n - 1 ? ' ' : '\n');
    }
    return 0;
}