|시간 제한||메모리 제한||제출||정답||맞은 사람||정답 비율|
|1 초||128 MB||14||7||5||50.000%|
An endless checked page consists of square cells. The length of each side of the cell is k units. Smuidris drew a circle of radius r units on this page. The center of the circle was located on the intersection of two lines (in the middle of 4 cells). Then Smuidris painted all the cells that were crossed by the circle (that contained a part of the circle). (If the circle only touched a corner of the cell, Smuidris did not paint the cell).
You are to write a program that for given values of natural numbers k and r (k < 30000, r < 30000) computes un outputs the number of cells painted by Smuidris.