neander2.py

def counting_gene_things(genes, is_growing):
    comparison_operator = ">" if is_growing else "<"

    previous_number = genes[0]
    is_neander_gene = False
    gene_counter = 1
    for index, number in enumerate(genes):
        if index == 0:
            continue

        if eval(f"{number} {comparison_operator} {previous_number}"):
            gene_counter += 1
            previous_number = number
        else:
            gene_counter = 1
            previous_number = number
            continue

        if gene_counter == 3:
            is_neander_gene = True
            return is_neander_gene

    return is_neander_gene


def main():
    answers = []
    while True:
        try:
            genes = [int(number) for number in input().split()]
            is_neander_gene_growing = counting_gene_things(genes, True)
            is_neander_gene_descending = counting_gene_things(genes, False)

            if is_neander_gene_growing or is_neander_gene_descending:
                answers.append("YES")
            else:
                answers.append("NO")

        except EOFError:
            break

    for answer in answers:
        print(answer)


if __name__ == "__main__":
    main()