[python]分類配列から特定数のカウントを求める

📌 質問する

📌 に答える

from bisect import bisect_left, bisect_right

n, x = map(int, input().split())
array = list(map(int, input().split()))
diff = bisect_right(array, x) - bisect_left(array, x)

if diff == 0:
    print(-1)
else:
    print(diff)

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