Package g2601_2700.s2678_number_of_senior_citizens

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2678 - Number of Senior Citizens\.

    Easy

    You are given a 0-indexed array of strings details. Each element of details provides information about a given passenger compressed into a string of length 15. The system is such that:

    • The first ten characters consist of the phone number of passengers.

    • The next character denotes the gender of the person.

    • The following two characters are used to indicate the age of the person.

    • The last two characters determine the seat allotted to that person.

    Return the number of passengers who are strictly more than 60 years old.

    Example 1:

    Input: details = "7868190130M7522","5303914400F9211","9273338290F4010"

    Output: 2

    Explanation: The passengers at indices 0, 1, and 2 have ages 75, 92, and 40. Thus, there are 2 people who are over 60 years old.

    Example 2:

    Input: details = "1313579440F2036","2921522980M5644"

    Output: 0

    Explanation: None of the passengers are older than 60.

    Constraints:

    • 1 <= details.length <= 100

    • details[i].length == 15

    • details[i] consists of digits from '0' to '9'.

    • details[i][10] is either 'M' or 'F' or 'O'.

    • The phone numbers and seat numbers of the passengers are distinct.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer countSeniors(Array<String> details)

      • Methods inherited from class java.lang.Object

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