✅Zero Padding(Contest)

Zero Padding(Contest) easy Time Limit: 2 sec Memory Limit: 128000 kB

Problem Statement :

Padding is a process of adding layers of zeros to the input image. If we want to have p layers of padding then we have to add p layers of zeroes on borders.

Given two integers N and p. How many zeroes are needed to be added to N X N image to give p layers of zero padding? Input First line contains N and p.

Constraints 1 ≤ N, p ≤ 108 Output Output a single integer denoting the required number of zeroes. Example Input: 3 1

Output: 16

Explanation : 0 0 0 0 0 0 1 2 3 0 0 4 5 6 0 0 7 8 9 0 0 0 0 0 0

link:https://my.newtonschool.co/playground/code/0j86cqzmfjia/

```java
import java.io.*; // for handling input/output
import java.util.*; // contains Collections framework

// don't change the name of this class
// you can add inner classes if needed
class Main {
    public static void main (String[] args) {
        // Your code here
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        long res=0;
        int p=sc.nextInt();
        while(p-->0){
            res+=4*(1+n);
            n=n+2;
        }
        System.out.print(res);
    }
}
```