Submission #1070580

---

Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
	public static void Main()
	{
		int N = int.Parse(Console.ReadLine());
		int i = 0;
		int ans = 0;
		while (i < N)
		{
			int d = N - i;
			int l = 1 << (int)Math.Log(d, 2);
			Console.WriteLine($"? {i} {i + l}");
			i += l;
			ans += int.Parse(Console.ReadLine());
		}
		Console.WriteLine($"! {ans}");
	}
}

Submission Info

Judge Result