CareerCup

Isn't it same as a palindrome check question? If yes, here is the java code:

public class Test {
    static boolean isPowerList(int[] arr){
        //Take 2 pointers- one starts forward from 0 and another starts from end backwards
        int i=0, j=arr.length-1;
        while (i<j){
            if (arr[i++] != arr[j--]){
                return false;
            }
        }
        return true;
    }
    public static void main(String[] args) {
        int[] arr1 = {1,2,1};
        int[] arr2 = {1,2,3,4,5,6,7,6,5,4,3,2,1,1};
        int[] arr3 = {1,2,3,4,5,6,1000,6,5,4,3,2,1};
        System.out.println(isPowerList(arr1)); //true
        System.out.println(isPowerList(arr2)); //false
        System.out.println(isPowerList(arr3)); //true
    }
}

arr = map(list(int, input().rstrip().split()))
x = len(arr)
a = []
for i range(x//2):
if arr[i] == arr[x-i]:
a.append(1)
else:
a.append(0)
if 0 in a:
print("False")
else:
print("True")

import java.lang.Math;
public class PowerList {
	public boolean isPowerList(int[] inputPowerList) {
		boolean isPowerList = true;
		int size=inputPowerList.length;
		if(inputPowerList[0]==inputPowerList[size-1]) {
			for(int i=0;i<inputPowerList.length-1; i++) {
			 if(Math.abs(inputPowerList[i]-inputPowerList[i+1])!=1) {
			   isPowerList=false;
			   break;
			  }
			}
		}
		else{
			isPowerList=false;
		}
	return isPowerList;
	}
	public static void main(String args[]) {
		PowerList obj = new PowerList();
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,0,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1,9}));
	}
}

import java.lang.Math;
public class PowerList {
	public boolean isPowerList(int[] inputPowerList) {
		boolean isPowerList = true;
		int size=inputPowerList.length;
		if(inputPowerList[0]==inputPowerList[size-1]) {
			for(int i=0;i<inputPowerList.length-1; i++) {
			 if(Math.abs(inputPowerList[i]-inputPowerList[i+1])!=1) {
			   isPowerList=false;
			   break;
			  }
			}
		}
		else{
			isPowerList=false;
		}
	return isPowerList;
	}
	public static void main(String args[]) {
		PowerList obj = new PowerList();
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,0,1}));
		System.out.println(obj.isPowerList(new int[]{1,2,3,4,5,6,7,6,5,4,3,2,1,9}));
	}
}