Package g2001_2100.s2100_find_good_days_to_rob_the_bank

Class Solution

java.lang.Object
g2001_2100.s2100_find_good_days_to_rob_the_bank.Solution
public class Solution extends java.lang.Object
2100 - Find Good Days to Rob the Bank.

Medium

You and a gang of thieves are planning on robbing a bank. You are given a 0-indexed integer array security, where security[i] is the number of guards on duty on the ith day. The days are numbered starting from 0. You are also given an integer time.

The ith day is a good day to rob the bank if:

  • There are at least time days before and after the ith day,
  • The number of guards at the bank for the time days before i are non-increasing , and
  • The number of guards at the bank for the time days after i are non-decreasing.

More formally, this means day i is a good day to rob the bank if and only if security[i - time] >= security[i - time + 1] >= ... >= security[i] <= ... <= security[i + time - 1] <= security[i + time].

Return a list of all days (0-indexed) that are good days to rob the bank. The order that the days are returned in does not matter.

Example 1:

Input: security = [5,3,3,3,5,6,2], time = 2

Output: [2,3]

Explanation:

On day 2, we have security[0] >= security[1] >= security[2] <= security[3] <= security[4].

On day 3, we have security[1] >= security[2] >= security[3] <= security[4] <= security[5].

No other days satisfy this condition, so days 2 and 3 are the only good days to rob the bank.

Example 2:

Input: security = [1,1,1,1,1], time = 0

Output: [0,1,2,3,4]

Explanation: Since time equals 0, every day is a good day to rob the bank, so return every day.

Example 3:

Input: security = [1,2,3,4,5,6], time = 2

Output: []

Explanation:

No day has 2 days before it that have a non-increasing number of guards.

Thus, no day is a good day to rob the bank, so return an empty list.

Constraints:

  • 1 <= security.length <= 105
  • 0 <= security[i], time <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.lang.Integer>
    goodDaysToRobBank(int[] security, int time)
     

    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

    • goodDaysToRobBank

      public java.util.List<java.lang.Integer> goodDaysToRobBank(int[] security, int time)