Package g2401_2500.s2483_minimum_penalty_for_a_shop

Class Solution

java.lang.Object

g2401_2500.s2483_minimum_penalty_for_a_shop.Solution

public class Solution
extends java.lang.Object

2483 - Minimum Penalty for a Shop.

Medium

You are given the customer visit log of a shop represented by a 0-indexed string customers consisting only of characters 'N' and 'Y':

• if the ith character is 'Y', it means that customers come at the ith hour
• whereas 'N' indicates that no customers come at the ith hour.

If the shop closes at the jth hour (0 <= j <= n), the penalty is calculated as follows:

• For every hour when the shop is open and no customers come, the penalty increases by 1.
• For every hour when the shop is closed and customers come, the penalty increases by 1.

Return the earliest hour at which the shop must be closed to incur a minimum penalty.

Note that if a shop closes at the jth hour, it means the shop is closed at the hour j.

Example 1:

Input: customers = “YYNY”

Output: 2

Explanation:

• Closing the shop at the 0^th hour incurs in 1+1+0+1 = 3 penalty.
• Closing the shop at the 1^st hour incurs in 0+1+0+1 = 2 penalty.
• Closing the shop at the 2^nd hour incurs in 0+0+0+1 = 1 penalty.
• Closing the shop at the 3^rd hour incurs in 0+0+1+1 = 2 penalty.
• Closing the shop at the 4^th hour incurs in 0+0+1+0 = 1 penalty.

Closing the shop at 2^nd or 4^th hour gives a minimum penalty. Since 2 is earlier, the optimal closing time is 2.

Example 2:

Input: customers = “NNNNN”

Output: 0

Explanation: It is best to close the shop at the 0^th hour as no customers arrive.

Example 3:

Input: customers = “YYYY”

Output: 4

Explanation: It is best to close the shop at the 4^th hour as customers arrive at each hour.

Constraints:

• 1 <= customers.length <= 105
• customers consists only of characters 'Y' and 'N'.

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	bestClosingTime(java.lang.String customers)

Methods inherited from class java.lang.Object

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

Constructor Details

Solution

public Solution()

Method Details

bestClosingTime

public int bestClosingTime(java.lang.String customers)