import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		// 入力
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int D = sc.nextInt();
		int[] pos = new int[N];
		pos[0] = 0;
		for(int i = 1; i < N; i++){
			int dist = sc.nextInt();
			pos[i] = pos[i-1] + dist;
		}
		
		// 再整列
		for(int i = 1; i < N; i++){
			if(pos[i] - pos[i-1] < D){
				pos[i] = pos[i-1] + D;
			}
		}
		
		// 出力
		System.out.print(pos[0]);
		for(int i = 1; i < N; i++){
			System.out.print(" " + pos[i]);
		}
		System.out.println("");
	}
}