#include <stdio.h>
#include <string.h>
#include <stdbool.h>

int main(void) {
    int n, q, on = 0;
    bool lamp[500005];
    scanf("%d %d", &n, &q);

    memset(lamp, false, sizeof(lamp));

    while (q--) {
        int i, l, r;
        scanf("%d %d", &l, &r);

        for (i = l; i <= r; ++i) {
            if (lamp[i]) {
                lamp[i] = 0;
                --on;
            } else {
                lamp[i] = 1;
                ++on;
            }
        }

        printf("%d\n", on);
    }

    return (0);
}