#include <iostream>
#include <vector>
#include <string>
#include <utility>
#include <algorithm>
#include <climits>
#include <map>
#include <queue>
#include <cmath>

using namespace std;

using int64 = long long;

int main() {
    int64 n,d;
    cin >> n >> d;
    vector a(n,0LL);
    for (int i=1; i<n; i++) cin >> a[i];
    vector b(n,0LL);
    for (int i=1; i<n; i++) b[i] = b[i-1] + a[i];
    for (int i=0; i<n; i++) cerr<<b[i]<<" ";cerr<<endl;

    int64 x = 0;
    cout << x << " ";
    for (int i=1; i<n; i++) {
        if (b[i] - b[i-1] < d) {
            b[i] = b[i-1] + d;
        }
        cout << b[i] << (i!=n-1? " " : "\n");
    }
}