Problem: This is an interactive problem. You should use flush operation after each printed line. For example, in C++ you should use fflush(stdout), in Java you should use System.out.flush(), and in Pascal — flush(output).

In this problem you should guess an array a which is unknown for you. The only information you have initially is the length n of the array a.

The only allowed action is to ask the sum of two elements by their indices. Formally, you can print two indices i and j (the indices should be distinct). Then your program should read the response: the single integer equals to ai + aj.

It is easy to prove that it is always possible to guess the array using at most n requests.

Write a program that will guess the array a by making at most n requests.

Interaction

In each test your program should guess a single array.

The input starts with a line containing integer n (3 ≤ n ≤ 5000) — the length of the array. Your program should read it at first.

After that your program should print to the standard output the requests about the sum of two elements or inform that the array is guessed.

  * In case your program is making a request to ask the sum of two elements, it should print line in the format "? i j" (i and j are distinct integers between 1 and n), where i and j are indices in the array a.
  * In case your program informs that the array is guessed, it should print line in the format "! a1 a2 ... an" (it is guaranteed that all ai are positive integers not exceeding 105), where ai is the i-th element of the array a. 



The response on a request is a single integer equal to ai + aj, printed on a separate line.

Your program can do at most n requests. Note that the final line «! a1 a2 ... an» is not counted as a request.

Do not forget about flush operation after each printed line.

After you program prints the guessed array, it should terminate normally.

Example

Input

5
 
9
 
7
 
9
 
11
 
6
 

Output

 
? 1 5
 
? 2 3
 
? 4 1
 
? 5 2
 
? 3 4
 
! 4 6 1 5 5

Note

The format of a test to make a hack is:

  * The first line contains an integer number n (3 ≤ n ≤ 5000) — the length of the array.
  * The second line contains n numbers a1, a2, ..., an (1 ≤ ai ≤ 105) — the elements of the array to guess. 

Solution (in JAVA):

Solution:

/**
 * Author:-Harsh Chaudhari
 * College:-DA-IICT
 */
import java.util.*;
import java.io.*;

public class C727 {

	public static void main(String[] args) {
		InputReader s = new InputReader(System.in);
		PrintWriter out = new PrintWriter(System.out);
		/*My code starts here.*/
		int n = s.nextInt();
		long arr[] = new long[n];
		if(n>=5){
			System.out.println("? "+1+" "+2);
			System.out.flush();
			long tmp1 = s.nextLong();
			System.out.println("? "+2+" "+3);
			System.out.flush();
			long tmp2 = s.nextLong();
			System.out.println("? "+3+" "+4);
			System.out.flush();
			long tmp3 = s.nextLong();
			System.out.println("? "+1+" "+5);
			System.out.flush();
			long tmp4 = s.nextLong();
			System.out.println("? "+4+" "+5);
			System.out.flush();
			long tmp5 = s.nextLong();
			
			arr[0] = ((tmp1+tmp3-tmp2) + (tmp4 - tmp5))/2;
			arr[1] = tmp1 - arr[0];
			arr[2] = tmp2-arr[1];
			arr[3] = tmp3-arr[2];
			arr[4] = tmp4 - arr[0];
			
			for(int i=0;i<(n-5);i++){
				System.out.println("? "+(i+5)+" "+(i+6));
				System.out.flush();
				long p = s.nextLong();
				arr[i+5] = p-arr[i+4];
			}
		}
		else if(n==4){
			System.out.println("? "+1+" "+2);
			System.out.flush();
			long tmp1 = s.nextLong();
			System.out.println("? "+2+" "+3);
			System.out.flush();
			long tmp2 = s.nextLong();
			System.out.println("? "+3+" "+4);
			System.out.flush();
			long tmp3 = s.nextLong();
			System.out.println("? "+2+" "+4);
			System.out.flush();
			long tmp4 = s.nextLong();
			
			arr[0] = ((tmp1+tmp3-tmp2) + (tmp1 - tmp4))/2;
			arr[1] = tmp1 - arr[0];
			arr[2] = tmp2-arr[1];
			arr[3] = tmp3-arr[2];
			
		}
		else if(n==3){
			System.out.println("? "+1+" "+2);
			System.out.flush();
			long tmp1 = s.nextLong();
			System.out.println("? "+2+" "+3);
			System.out.flush();
			long tmp2 = s.nextLong();
			System.out.println("? "+3+" "+1);
			System.out.flush();
			long tmp3 = s.nextLong();
			
			arr[0] = ((tmp1-tmp2) + tmp3)/2;
			arr[1] = tmp1 - arr[0];
			arr[2] = tmp2-arr[1];
			
		}
		out.print("! ");
		for(int i=0;i<n;i++)
			out.print(arr[i]+" ");
		out.println();
		/*My code ends here.*/
		out.close();
	}

	static class Node implements Comparable<Node> {
		int num, freq, idx;

		public Node(int u, int v, int idx) {
			this.num = u;
			this.freq = v;
			this.idx = idx;
		}

		public int compareTo(Node n) {
			if (this.freq == n.freq)
				return Integer.compare(this.num, n.num);
			return Integer.compare(-this.freq, -n.freq);
		}
	}

	static long PowerMod(long a, long b, long m) {
		long tempo;
		if (b == 0)
			tempo = 1;
		else if (b == 1)
			tempo = a;
		else {
			long temp = PowerMod(a, b / 2, m);
			if (b % 2 == 0)
				tempo = (temp * temp) % m;
			else
				tempo = ((temp * temp) % m) * a % m;
		}
		return tempo;
	}

	static void shortestPaths(List<Edge>[] edges, int s, int[] prio, int[] pred) {
		Arrays.fill(pred, -1);
		Arrays.fill(prio, Integer.MAX_VALUE);
		prio[s] = 0;
		PriorityQueue<Long> q = new PriorityQueue<>();
		q.add((long) s);
		while (!q.isEmpty()) {
			long cur = q.remove();
			int curu = (int) cur;
			if (cur >>> 32 != prio[curu])
				continue;
			for (Edge e : edges[curu]) {
				int v = e.t;
				int nprio = prio[curu] + e.cost;
				if (prio[v] > nprio) {
					prio[v] = nprio;
					pred[v] = curu;
					q.add(((long) nprio << 32) + v);
				}
			}
		}
	}

	static class Edge {
		int t, cost;

		public Edge(int t, int cost) {
			this.t = t;
			this.cost = cost;
		}
	}

	static class InputReader {

		private InputStream stream;
		private byte[] buf = new byte[8192];
		private int curChar, snumChars;
		private SpaceCharFilter filter;

		public InputReader(InputStream stream) {
			this.stream = stream;
		}

		public int snext() {
			if (snumChars == -1)
				throw new InputMismatchException();
			if (curChar >= snumChars) {
				curChar = 0;
				try {
					snumChars = stream.read(buf);
				} catch (IOException e) {
					throw new InputMismatchException();
				}
				if (snumChars <= 0)
					return -1;
			}
			return buf[curChar++];
		}

		public int nextInt() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = snext();
			}
			int res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = snext();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		public long nextLong() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = snext();
			}
			long res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = snext();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		public int[] nextIntArray(int n) {
			int a[] = new int[n];
			for (int i = 0; i < n; i++)
				a[i] = nextInt();
			return a;
		}

		public String readString() {
			int c = snext();
			while (isSpaceChar(c))
				c = snext();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = snext();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		public boolean isSpaceChar(int c) {
			if (filter != null)
				return filter.isSpaceChar(c);
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		public interface SpaceCharFilter {
			public boolean isSpaceChar(int ch);
		}
	}
}