LeetCode Entry

3014. Minimum Number of Pushes to Type Word I

30.07.2026 easy 2026 kotlin rust

Minimum num-phone presses

3014. Minimum Number of Pushes to Type Word I easy substack youtube

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Problem TLDR

Minimum num-phone presses

Intuition

first eight take one click, second eight takes 2 clicks and so on

Approach

• and from thsi derived the math 8(1+2+..len/8) = 8 * (len/8 * (len/8 + 1)/2); plus the leftovers len%8*(len/8 + 1)

Complexity

• Time complexity: \(O(1)\)

• Space complexity: \(O(1)\)

Code

    fun minimumPushes(w: String) =
    w.indices.sumOf { it/8+1 }

    pub fn minimum_pushes(w: String) -> i32 {
        let k = w.len()/8; ((4*k+w.len()%8)*(k+1)) as _
    }