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back to board1. in the equation a*t^2+b*t+c=0, consider this case: a=0.
2. maybe you will get two positive value of t, and you should check both of them, because the dart will go through the plane twice.
I got AC after getting Crash & WA for the reasons above. I considered this 2 cases and even the case: b=0, but anyway I got WA 6 again :( t can be only positive? OMFG! So stupid mistake))) Now I've got 'AC' Thank you :D |
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