CS101-LC04 — LeetCode Practice 🧪

🧩 LC-TEST-01 Sorting

Question: Sort an integer array.

Input

[3,1,2]

Output

[1,2,3]

Solution (Python)

def sort_array(nums):
    return sorted(nums)  # Timsort: O(n log n)

🧮 LC-TEST-02 Prime Number

Question: Check if n is prime.

Solution

def is_prime(n):
    if n <= 1:
        return False
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            return False
    return True

🍬 LC-TEST-03 Candy (Greedy)

Idea

Use two passes (left → right, right → left)

Last updated on 2025