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// @Title: 学生分数的最小差值 (Minimum Difference Between Highest and Lowest of K Scores)
// @Author: 15816537946@163.com
// @Date: 2022-02-11 23:59:44
// @Runtime: 8 ms
// @Memory: 5 MB
func minimumDifference(nums []int, k int) int {
    sort.Ints(nums)
    ans := math.MaxInt32
    for i, num := range nums[:len(nums)-k+1] {
        ans = min(ans, nums[i+k-1]-num)
    }
    return ans
}

func min(a, b int) int {
    if a > b {
        return b
    }
    return a
}