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SRM 498 will be held at 26 february 17:00 GMT. Good luck, have fun!
And may The Force be with you.
And may The Force be with you.
Discuss SRM 490 there.
I am working as a teacher in Lyceum Fryazino.
I decided to teach my computer science group to code Java programs. As a learning IDE i chose Greenfoot.
I will write a post in my blog about this IDE soon. Last evening i made this:
Jedi tetris.
My score is 9100.
P.S.
Thanks to "Export" button i uploaded my scenario to the web-site as a java applet.
I decided to teach my computer science group to code Java programs. As a learning IDE i chose Greenfoot.
I will write a post in my blog about this IDE soon. Last evening i made this:
Jedi tetris.
My score is 9100.
P.S.
Thanks to "Export" button i uploaded my scenario to the web-site as a java applet.
Lets start from the end.
.
So, the three stadiums are observed at the same angle if R1 / r1 = R2 / r2 = R3 / r3.
Take two different points A, B. The set of points C that AC / BC = const is either a line (perpendicular bisector of AB) or a circle with center somewhere on the line AB. This circle is easy to find. It contains two points that lie on AB and satisfy AC / BC condition.
Problem С. Commentator problem
Let R be the distance from point А to a circle with center О and radius r. From this point the circle is observed at the angle.So, the three stadiums are observed at the same angle if R1 / r1 = R2 / r2 = R3 / r3.
Take two different points A, B. The set of points C that AC / BC = const is either a line (perpendicular bisector of AB) or a circle with center somewhere on the line AB. This circle is easy to find. It contains two points that lie on AB and satisfy AC / BC condition.
Tutorial of Codeforces Beta Round 2
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