import java.util.Scanner;


public class HelloWorld {
		public static void main (String[] args) {
			Scanner sc = new Scanner(System.in);
			int n = sc.nextInt();
			int d = sc.nextInt();
			int[] ai = new int[n];
			ai[0] = 0;
			for (int i = 1;i < n; i ++) {
				ai[i] = ai[i - 1] + sc.nextInt();

			}
			sc.close();

			for (int i = 0; i < n; i ++) {
				if (i > 0 && ai[i] < ai[i - 1] + d) {
					ai[i] = ai[i - 1] + d;
				}
				System.out.print(ai[i]);
				if (i == n - 1) {
					break;
				}
				System.out.print(" ");
			}

	}
}