mod = 998244353


def main():
    import sys
    from bisect import bisect_left
    input = sys.stdin.readline

    N, M = map(int, input().split())
    U0 = set()
    U1 = set()
    V0 = set()
    V1 = set()
    ans = 0
    for _ in range(M):
        x, y = map(int, input().split())
        u = x + y
        v = x - y
        if u & 1:
            U1.add(u)
        else:
            U0.add(u)
        if v & 1:
            V1.add(v)
        else:
            V0.add(v)
        ans += N - abs(N + 1 - u)
        ans += N - abs(v)
        ans -= 1
    U0 = sorted(list(U0))
    U1 = sorted(list(U1))
    V0 = sorted(list(V0))
    V1 = sorted(list(V1))

    for u in U0:
        mi = max(2 - u, -2 * N + u)
        ma = min(2 * N - u, -2 + u)
        ans -= bisect_left(V0, ma + 1) - bisect_left(V0, mi)
    for u in U1:
        mi = max(2 - u, -2 * N + u)
        ma = min(2 * N - u, -2 + u)
        ans -= bisect_left(V1, ma + 1) - bisect_left(V1, mi)
    print(ans)


if __name__ == '__main__':
    main()