using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var q = int.Parse(line[1]);
        getAns(n, q);
    }
    static void getAns(int n, int q)
    {
        var ans = new int[q];
        var on = new bool[n];
        var count = 0;
        for (int i = 0; i < q; i++)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var L = int.Parse(line[0]) - 1;
            var r = int.Parse(line[1]) - 1;
            for (int j = L; j <= r; j++)
            {
                if (on[j]) { on[j] = false; count--; }
                else { on[j] = true; count++; }
            }
            ans[i] = count;
        }
        Console.WriteLine(string.Join("\n", ans));
    }
}