| 시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
|---|---|---|---|---|---|
| 1 초 | 128 MB | 81 | 46 | 35 | 62.500% |
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.
1 5
28
3 7
20