Given the rank of a student and the total number of students appearing in an examination, the task is to find the percentile of the student.
The percentile of a student is the % of the number of students having marks less than him/her.
Examples:
Input: Rank: 805, Total Number of Students Appeared: 97481
Output: 99.17
Explanation:
((97481 – 805) / 97481) * 100 = 99.17
Input: Rank: 65, Total Number of Students Appeared: 100
Output: 35
Explanation:
((100 – 65) / 100) * 100 = 35
Approach
The formula to calculate the percentile when the rank of the student and the total number of students appeared is given is:
((Total Students – Rank) / Total Students) * 100
Below is the implementation of the above formula:
C++
C++
// C++ program to calculate Percentile// of a student based on rank#include <bits/stdc++.h>using namespace std;// Program to calculate the percentilefloat getPercentile(int rank, int students){ // flat variable to store the result float result = float(students - rank) / students * 100; // calculate and return the percentile return result;}// Driver Codeint main(){ int your_rank = 805; int total_students = 97481; cout << getPercentile( your_rank, total_students);} |
Java
// Java program to calculate Percentile// of a student based on rankimport java.util.*;class GFG{ // Program to calculate the percentilestatic float getPercentile(int rank, int students){ // flat variable to store the result float result = (float)(students - rank) / students * 100; // calculate and return the percentile return result;} // Driver Codepublic static void main(String[] args){ int your_rank = 805; int total_students = 97481; System.out.print(getPercentile( your_rank, total_students));}}// This code is contributed by Princi Singh |
Python3
# Python3 program to calculate Percentile # of a student based on rank # Program to calculate the percentile def getPercentile(rank, students) : # flat variable to store the result result = (students - rank) / students * 100; # calculate and return the percentile return result; # Driver Code if __name__ == "__main__" : your_rank = 805; total_students = 97481; print(getPercentile(your_rank, total_students)); # This code is contributed by Yash_R |
C#
// C# program to calculate Percentile// of a student based on rankusing System;class GFG{ // Program to calculate the percentilestatic float getPercentile(int rank, int students){ // flat variable to store the result float result = (float)(students - rank) / students * 100; // calculate and return the percentile return result;} // Driver Codepublic static void Main(String[] args){ int your_rank = 805; int total_students = 97481; Console.Write(getPercentile( your_rank, total_students));}}// This code is contributed by Princi Singh |
Javascript
<script>// JavaScript program to calculate Percentile// of a student based on rank // Program to calculate the percentile function getPercentile(rank , students) { // flat variable to store the result var result = (students - rank) / students * 100; // calculate and return the percentile return result; } // Driver Code var your_rank = 805; var total_students = 97481; document.write(getPercentile(your_rank, total_students).toFixed(4));// This code contributed by aashish1995</script> |
Output:
99.1742
Performance Analysis:
- Time Complexity: In the above approach, we are able to calculate percentile using a formula in constant time, so the time complexity is O(1).
- Auxiliary Space Complexity: In the above approach, we are not using any extra space apart from a few constant size variables, so Auxiliary space complexity is O(1).
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