import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		int n = Integer.parseInt(sa[0]);
		int q = Integer.parseInt(sa[1]);

		int[] a = new int[n];
		int ans = 0;
		PrintWriter pw = new PrintWriter(System.out);
		for (int i = 0; i < q; i++) {
			sa = br.readLine().split(" ");
			int l = Integer.parseInt(sa[0]) - 1;
			int r = Integer.parseInt(sa[1]);
			for (int j = l; j < r; j++) {
				if (a[j] == 0) {
					a[j] = 1;
					ans++;
				} else {
					a[j] = 0;
					ans--;
				}
			}
			pw.println(ans);
		}
		pw.flush();
		br.close();
	}
}