LeetCode Entry

1344. Angle Between Hands of a Clock

18.06.2026 medium 2026 kotlin rust

Angle between clock arrows

1344. Angle Between Hands of a Clock medium substack youtube

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Problem TLDR

Angle between clock arrows

Intuition

• 360 degrees full circle
• 360/60=6 degrees one hour
• h*60+m total minutes M
• 5.5*M%360 periodic angle between hands of a clock

Approach

• Rust: successors

Complexity

• Time complexity: \(O(1)\)

• Space complexity: \(O(1)\)

Code

    fun angleClock(h: Int, m: Int) =
    180-abs(abs(h*30-5.5*m)-180)

    pub fn angle_clock(h: i32, m: i32) -> f64 {
        successors(Some(0.0f64),|a|Some((a+5.5)%360.))
        .nth((h*60+m)as usize %720).map(|a|a.min(360.-a)).unwrap()
    }