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

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int q = sc.nextInt();
        boolean[] lights = new boolean[n + 1];
        int count = 0;
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < q; i++) {
            int left = sc.nextInt();
            int right = sc.nextInt();
            for (int j = left; j <= right; j++) {
                lights[j] ^= true;
                if (lights[j]) {
                    count++;
                } else {
                    count--;
                }
            }
            sb.append(count).append("\n");
        }
        System.out.print(sb);
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}