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Problems

# Point on a ray

Determine whether a given point belongs to the ray.

#### Input

6 numbers are given - the coordinates of the point and the coordinates of the beginning and end of the vector. All input data are integers not exceeding 10000 by absolute value.

#### Output

Print YES if the point belongs to the ray, and NO otherwise.

Time limit 1 second
Memory limit 122.17 MiB
Input example #1
1 6 3 7 5 8

Output example #1
NO