Check if a triangle of positive area is possible with the given angles

Given three angles. The task is to check if it is possible to have a triangle of positive area with these angles. If it is possible print "YES" else print "NO".
Examples: 
 

Input : ang1 = 50, ang2 = 60, ang3 = 70 
Output : YES

Input : ang1 = 50, ang2 = 65, ang3 = 80
Output : NO

Approach: We can form a valid triangle if the below conditions satisfies: 
 

• The sum of the three given angles equals to 180.
• The sum of any two angles is greater than equal to the third one.
• None of the given angles is zero.

Below is the implementation of the above approach: 
 

YES

Time complexity: O(1)

Auxiliary Space: O(1)