We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  • HackerRank Home

    HackerRank

  • |
  • Prepare
  • Certify
  • Compete
  • Hiring developers?
  1. Prepare
  2. Tutorials
  3. 10 Days of Javascript
  4. Day 4: Count Objects

Day 4: Count Objects

Problem
Submissions
Leaderboard
Discussions
Editorial
Topics

Objective

In this challenge, we learn about iterating over objects. Check the attached tutorial for more details.

Task

Complete the function in the editor. It has one parameter: an array, , of objects. Each object in the array has two integer properties denoted by and . The function must return a count of all such objects in array that satisfy .

Input Format

The first line contains an integer denoting .
Each of the subsequent lines contains two space-separated integers describing the values of and .

Constraints

Output Format

Return a count of the total number of objects such that . Locked stub code in the editor prints the returned value to STDOUT.

Sample Input 0

5
1 1
2 3
3 3
3 4
4 5

Sample Output 0

2

Explanation 0

There are objects in the array:

Because we have two objects that satisfy (i.e., and ), we return as our answer.

Author

AvmnuSng

Difficulty

Easy

Max Score

15

Submitted By

77458

Need Help?


View discussions
View editorial
View top submissions
RESOURCES

  • JavaScript: Iterating Over Arrays

rate this challenge

MORE DETAILS

Download problem statement
Download sample test cases
Suggest Edits
  • Blog
  • Scoring
  • Environment
  • FAQ
  • About Us
  • Support
  • Careers
  • Terms Of Service
  • Privacy Policy