提出 #7680247

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ソースコード 拡げる

#!/usr/bin/env python3
import sys


def solve(n: int, p: "List[int]"):
    result = 0
    for i in range(len(p) - 2):
        if p[i] < p[i + 1] and p[i + 1] < p[i + 2]:
            result += 1
        elif p[i] > p[i + 1] and p[i + 1] > p[i + 2]:
            result += 1
    print(result)
    return


# Generated by 1.1.5 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    n = int(next(tokens))  # type: int
    p = [int(next(tokens)) for _ in range(n)]  # type: "List[int]"
    solve(n, p)

if __name__ == '__main__':
    main()

提出情報

ジャッジ結果