def main():
    import sys
    input = sys.stdin.read().split()
    idx = 0
    N = int(input[idx])
    idx += 1
    Q = int(input[idx])
    idx += 1

    lamps = [False] * (N + 2)  # 1-based indexing, up to N
    count = 0

    for _ in range(Q):
        L = int(input[idx])
        idx += 1
        R = int(input[idx])
        idx += 1
        for j in range(L, R + 1):
            if lamps[j]:
                count -= 1
            else:
                count += 1
            lamps[j] = not lamps[j]
        print(count)

if __name__ == '__main__':
    main()