![]() Kennethsnow has a special habit when watching videos, let me tell you. In this problem, we suppose that X and Y will always be constant. The circle will move along the blue bar, which is full now, indicating that downloading is already complete. The playing speed can also be described as the moving speed of the circle at the bottom of the videos, see the pictures below. Obviously, if X>Y, then you may have to pause for some time, since you cannot play something that hasn’t been downloaded! The other is the downloading speed: the speed the computer downloads the video from the internet, say Y KB per second. One is the playing speed: the speed you play the video, say X KB per second. When watching videos online, two numbers are very important. So in this problem we also deal with video-share websites. Actually, both of them are websites mainly for watching videos. Some of you may have already noticed, there is a team in our final contest whose name is UESTC_BiliBilii, with user id as ACfun. ![]()
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