Package g2601_2700.s2678_number_of_senior_citizens

Class Solution

java.lang.Object
g2601_2700.s2678_number_of_senior_citizens.Solution
public class Solution extends java.lang.Object
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.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    countSeniors(java.lang.String[] details)
     

    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

    • countSeniors

      public int countSeniors(java.lang.String[] details)