1344. Angle Between Hands of a Clock (M)

题目

Given two numbers, hour and minutes. Return the smaller angle (in degrees) formed between the hour and the minute hand.

Example 1:

Input: hour = 12, minutes = 30
Output: 165

Example 2:

Input: hour = 3, minutes = 30
Output: 75

Example 3:

Input: hour = 3, minutes = 15
Output: 7.5

Example 4:

Input: hour = 4, minutes = 50
Output: 155

Example 5:

Input: hour = 12, minutes = 0
Output: 0

Constraints:

• 1 <= hour <= 12
• 0 <= minutes <= 59
• Answers within 10^-5 of the actual value will be accepted as correct.

题意

计算时钟时针和分针的夹角。

思路

数学计算题。

代码实现

Java

class Solution {
    public double angleClock(int hour, int minutes) {
        double angleM = 6.0 * minutes;
        double angleH = 30.0 * hour + 30.0 * minutes / 60;
        double angle = Math.abs(angleM - angleH);
        return angle > 180 ? 360 - angle : angle;
    }
}