CF593B Anton and Lines
Description
The teacher gave Anton a large geometry homework, but he didn't do it (as usual) as he participated in a regular round on Codeforces. In the task he was given a set of $ n $ lines defined by the equations $ y=k_{i}·x+b_{i} $ . It was necessary to determine whether there is at least one point of intersection of two of these lines, that lays strictly inside the strip between $ x_{1}<x_{2} $ . In other words, is it true that there are $ 1
Input Format
The first line of the input contains an integer $ n $ ( $ 2
Output Format
Print "Yes" (without quotes), if there is at least one intersection of two distinct lines, located strictly inside the strip. Otherwise print "No" (without quotes).
Explanation/Hint
In the first sample there are intersections located on the border of the strip, but there are no intersections located strictly inside it.
