Choose Numbers

You are given an array of integers A.
You need to tell whether you can choose three numbers such that a+b>=c.

Input Format
First line consists of number of integers N. next line consists of N space separated integers.

Constraints
1 <= N <= 10^5

Output Format
YES or NO

Sample Input
5
1 2 3 4 9
Sample Output
YES
Explanation
you can choose 1+3 >= 4

Solve the question and raise the Pull Requests.