g2101_2200.s2110_number_of_smooth_descent_periods_of_a_stock

Class Solution

java.lang.Object

g2101_2200.s2110_number_of_smooth_descent_periods_of_a_stock.Solution

public class Solution
extends Object

2110 - Number of Smooth Descent Periods of a Stock.

Medium

You are given an integer array prices representing the daily price history of a stock, where prices[i] is the stock price on the ith day.

A smooth descent period of a stock consists of one or more contiguous days such that the price on each day is lower than the price on the preceding day by exactly 1. The first day of the period is exempted from this rule.

Return the number of smooth descent periods.

Example 1:

Input: prices = [3,2,1,4]

Output: 7

Explanation: There are 7 smooth descent periods:

[3], [2], [1], [4], [3,2], [2,1], and [3,2,1]

Note that a period with one day is a smooth descent period by the definition.

Example 2:

Input: prices = [8,6,7,7]

Output: 4

Explanation: There are 4 smooth descent periods: [8], [6], [7], and [7]

Note that [8,6] is not a smooth descent period as 8 - 6 ≠ 1.

Example 3:

Input: prices = [1]

Output: 1

Explanation: There is 1 smooth descent period: [1]

Constraints:

• 1 <= prices.length <= 105
• 1 <= prices[i] <= 105

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
long	getDescentPeriods(int[] prices)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

getDescentPeriods

public long getDescentPeriods(int[] prices)