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// @Title: 分发糖果 (Candy)
// @Author: 15816537946@163.com
// @Date: 2020-12-24 21:00:17
// @Runtime: 20 ms
// @Memory: 6.2 MB
func candy(ratings []int) int {
	n := len(ratings)
	left := make([]int, n)

	for i, r := range ratings {
		if i > 0 && r > ratings[i-1] {
			left[i] = left[i-1] + 1
		} else {
			left[i] = 1
		}

	}

	var right, ans int
	for i := n - 1; i >= 0; i-- {
		if i < n-1 && ratings[i] > ratings[i+1] {
			right++
		} else {
			right = 1
		}
		ans += max(left[i], right)
	}
	return ans

}

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