Question: An isosceles triangle is a triangle with (at least) two equal sides. You will be given the three sides of a triangle, check if it is an equilateral triangle. Note: Assume that the given number triples comply the triangle property (any one side is smaller than the sum of the other two sides).

Input specification: You will be given 3 integers (s1, s2, s3) where 0 ≤ (s1, s2, s3) ≤ 10 million.

Output specification: Show "Yes", if it complies the isosceles triangle property. Show "No", otherwise