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codes/python/chapter_hashing/simple_hash.py
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Yudong Jin
Some improvements (#1073)
07 фев 2024, 17:21
Не верифицирован
07 фев 2024, 17:21
a005c6e
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""" File: simple_hash.py Created Time: 2023-06-15 Author: krahets (krahets@163.com) """ def add_hash(key: str) -> int: """加法哈希""" hash = 0 modulus = 1000000007 for c in key: hash += ord(c) return hash % modulus def mul_hash(key: str) -> int: """乘法哈希""" hash = 0 modulus = 1000000007 for c in key: hash = 31 * hash + ord(c) return hash % modulus def xor_hash(key: str) -> int: """异或哈希""" hash = 0 modulus = 1000000007 for c in key: hash ^= ord(c) return hash % modulus def rot_hash(key: str) -> int: """旋转哈希""" hash = 0 modulus = 1000000007 for c in key: hash = (hash << 4) ^ (hash >> 28) ^ ord(c) return hash % modulus """Driver Code""" if __name__ == "__main__": key = "Hello 算法" hash = add_hash(key) print(f"加法哈希值为 {hash}") hash = mul_hash(key) print(f"乘法哈希值为 {hash}") hash = xor_hash(key) print(f"异或哈希值为 {hash}") hash = rot_hash(key) print(f"旋转哈希值为 {hash}")