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56 lines
1.1 KiB
Python
56 lines
1.1 KiB
Python
"""
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File: simple_hash.py
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Created Time: 2023-06-15
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Author: Krahets (krahets@163.com)
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"""
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def add_hash(key: str) -> int:
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"""加法哈希"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash += ord(c)
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return hash % modulus
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def mul_hash(key: str) -> int:
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"""乘法哈希"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash = 31 * hash + ord(c)
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return hash % modulus
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def xor_hash(key: str) -> int:
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"""异或哈希"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash ^= ord(c)
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return hash % modulus
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def rot_hash(key: str) -> int:
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"""旋转哈希"""
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hash = 0
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modulus = 1000000007
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for c in key:
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hash = (hash << 4) ^ (hash >> 28) ^ ord(c)
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return hash % modulus
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"""Driver Code"""
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if __name__ == "__main__":
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hash = add_hash("Hello 算法")
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print(f"加法哈希值为 {hash}")
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hash = mul_hash("Hello 算法")
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print(f"乘法哈希值为 {hash}")
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hash = xor_hash("Hello 算法")
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print(f"异或哈希值为 {hash}")
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hash = rot_hash("Hello 算法")
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print(f"旋转哈希值为 {hash}")
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