#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <cmath>
#include <numeric>
#include <utility>
#include <iomanip>

using namespace std;
using int64 = long long;

struct aaa{aaa(){cin.tie(nullptr); ios::sync_with_stdio(false); cout<<fixed<<setprecision(20);};}aaa;

int main() {
    int n, d;
    cin >> n >> d;
    vector<int> a(n, 0);
    for (int i=1; i<n; i++) cin >> a[i];
    for (int i=1; i<n; i++) {
        if (a[i] < d) {
            if (i < n-1)
                a[i+1] -= d - a[i];
            a[i] = d;
        }
    }
    int64 distance = 0;
    for (int i=0; i<n; i++) {
        if (i) cout << " ";
        cout << a[i]+distance;
        distance += a[i];
    }
    cout << endl;
}