Package g1301_1400.s1346_check_if_n_and_its_double_exist

Class Solution

java.lang.Object

g1301_1400.s1346_check_if_n_and_its_double_exist.Solution

public class Solution
extends Object

1346 - Check If N and Its Double Exist\. Easy Given an array `arr` of integers, check if there exists two integers `N` and `M` such that `N` is the double of `M` ( i.e. `N = 2 * M`). More formally check if there exists two indices `i` and `j` such that : * `i != j` * `0 <= i, j < arr.length` * `arr[i] == 2 * arr[j]` **Example 1:** **Input:** arr = [10,2,5,3] **Output:** true **Explanation:** N `= 10` is the double of M `= 5`,that is, `10 = 2 * 5`. **Example 2:** **Input:** arr = [7,1,14,11] **Output:** true **Explanation:** N `= 14` is the double of M `= 7`,that is, `14 = 2 * 7`. **Example 3:** **Input:** arr = [3,1,7,11] **Output:** false **Explanation:** In this case does not exist N and M, such that N = 2 \* M. **Constraints:** * `2 <= arr.length <= 500` * `-10^3 <= arr[i] <= 10^3`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
boolean	checkIfExist(int[] arr)

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

checkIfExist

public boolean checkIfExist(int[] arr)