#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int N,D; cin >> N >> D;
    vector<int> a = {0};
    rep(i,N-1) { int x; cin >> x; a.push_back(x); }
    int p = -1e9, s = 0;
    rep(i,N) {
        if(!(p + D <= a[i])) a[i] = p + D, s += D;
        else a[i] += s;
        cout << a[i] << " ";
        p = a[i];
    } cout << endl;
}