Class Solution
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 theith
hour - whereas
'N'
indicates that no customers come at theith
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 0th hour incurs in 1+1+0+1 = 3 penalty.
- Closing the shop at the 1st hour incurs in 0+1+0+1 = 2 penalty.
- Closing the shop at the 2nd hour incurs in 0+0+0+1 = 1 penalty.
- Closing the shop at the 3rd hour incurs in 0+0+1+1 = 2 penalty.
- Closing the shop at the 4th hour incurs in 0+0+1+0 = 1 penalty.
Closing the shop at 2nd or 4th 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 0th hour as no customers arrive.
Example 3:
Input: customers = “YYYY”
Output: 4
Explanation: It is best to close the shop at the 4th hour as customers arrive at each hour.
Constraints:
1 <= customers.length <= 105
customers
consists only of characters'Y'
and'N'
.
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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bestClosingTime
public int bestClosingTime(java.lang.String customers)
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