📅  最后修改于: 2023-12-03 14:53:54.576000             🧑  作者: Mango
有一个给定的序列,需要将其转换为几何级数。现在需要计算转换为几何级数的最小操作数。假设一个序列可以转换为几何级数,如果它包含至少两个元素,且相邻元素之间的比率是相同的。比率被称为公比。
import math
def gcd(a, b):
if b == 0:
return a
return gcd(b, a % b)
def min_operations(arr):
min_val = min(arr)
max_val = max(arr)
ratio = float(max_val) / min_val
if ratio.is_integer():
return 0
numerator = int(ratio * 10000)
denominator = 10000
divisor = gcd(numerator, denominator)
numerator /= divisor
denominator /= divisor
ratio = float(numerator) / denominator
ops = 0
for num in arr:
expected_num = min_val * math.pow(ratio, math.log(num / min_val, ratio))
diff = abs(num - expected_num)
diff *= denominator
ops += int(diff)
return ops / 10000
代码中用到了欧几里得算法求两个数的最大公约数,同时将小数乘以10000,转换成整数进行计算,最后再除以10000。运算的精度为小数点后4位。