如何将一个整数数组转换为一个排列并计算其中的循环数？

def count_cycles(nums):
    nums.sort()  # 对整数数组进行排序
    n = len(nums)
    visited = [False] * n  # 初始化visited数组

    total_cycles = 0
    for i in range(n):
        if not visited[i]:
            count = 0
            index = i
            while not visited[index]:
                visited[index] = True
                count += 1
                index = nums[index]
            total_cycles += count - 1

    return total_cycles

# 示例用法
nums = [3, 4, 2, 0, 1]
result = count_cycles(nums)
print("循环数：", result)