3208: Catch the idol

SZY is the star of the BUCT-ACM/ICPC Association, and everyone is his fan. Because of this, everyone wants to get his signature. To kit fit, SZY stars running everyday. Someday, you find SZY is running along the circular race track on the playground fortunately. At the instant seeing him, you take out paper and pen immediately and want to get his signature. Suppose you stand in the center of the circular race track, you rush to him without hesitation. However, you cannot run too far since you are out of exercise.

Now, here is the problem. Given the maximum distance you can run, you are asked to check whether you can catch up with SZY. Assume that the values of SZY's and yours velocity are both constants. At the same time, SZY, you, and the center of the circular race track ALWAYS form a straight line during this process. Note that the you and SZY can be considered as two points.

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10000 40000 3000 4000

Too young, too simple.
Just do it.