LeetCode Entry

3963. Create Grid With Exactly One Path

27.10.2026 easy 2026 kotlin rust

Any maze with single path

3963. Create Grid With Exactly One Path easy substack youtube

https://dmitrysamoylenko.com/leetcode/

Join me on Telegram

https://t.me/leetcode_daily_unstoppable/1524

Problem TLDR

Any maze with single path

Intuition

Top row and rigthmost column is free, others are walls

Approach

• repeat and string concatenation works the same on Rust and Kotlin

Complexity

• Time complexity: \(O(n)\)

• Space complexity: \(O(n)\)

Code

    fun createGrid(m: Int, n: Int) =
    List(m){if (it<1)".".repeat(n) else "#".repeat(n-1)+"."}

    pub fn create_grid(m: i32, n: i32) -> Vec<String> {
        (0..m).map(|i| if i<1{ ".".repeat(n as usize)}else{"#".repeat(n as usize-1)+"."}).collect()
    }