import hashlibdef HASH(s): return int(hashlib.sha256(s.encode()).hexdigest(), 16)def SHR(x, n): return x >> nv =2014100008d = 1n = 160x = 1while True: s = str(x) if HASH(str(v) + s) < SHR((2 ** n - 1), d * 4): break x += 1print(x)优化这串代码,使得运算量减小
时间: 2023-05-29 19:06:04 浏览: 81
import hashlibdef HASH(s): return int(hashlib.sha256(s.encode()).hexdigest(), 16)def SHR(x, n): return x >> nv = 2014100008d = 1n = 160x = 1target = SHR((2 ** n - 1), d * 4)while True: if HASH(str(v) + str(x)) < target: break x += 1print(x)
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import hashlibdef HASH(s): return int(hashlib.sha256(s.encode()).hexdigest(), 16)def SHR(x, n): return x >> nv = 100000d = 1n = 160x = 1while True: s = str(x) if HASH(str(v) + s) < SHR((2 ** n - 1), d * 4): break x += 1print(x)优化这串代码,使得运算量减小
可以进行以下优化:
1. 将常量值提前定义,避免重复计算
2. 将字符串转换为字节串进行哈希计算,避免多次编码解码
3. 将位移运算符替换为乘除运算符,避免使用位运算
4. 将循环条件改为计数器,避免使用 while True 循环
5. 将函数调用改为内联操作,避免函数调用开销
6. 将运算符优先级调整,避免使用括号
7. 将比较运算符改为等价的数学符号,提高代码可读性
优化后的代码如下:
import hashlib
v = 100000
d = 1
n = 160
x = 1
for i in range(v):
b = str(x).encode()
h = int(hashlib.sha256(b).hexdigest(), 16)
if h < (2 ** n - 1) // (d * 4):
break
x += 1
print(x)
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