CF820B.Mister B and Angle in Polygon

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题目描述

On one quiet day all of sudden Mister B decided to draw angle aa on his field. Aliens have already visited his field and left many different geometric figures on it. One of the figures is regular convex nn -gon (regular convex polygon with nn sides).

That's why Mister B decided to use this polygon. Now Mister B must find three distinct vertices v1v_{1} , v2v_{2} , v3v_{3} such that the angle (where v2v_{2} is the vertex of the angle, and v1v_{1} and v3v_{3} lie on its sides) is as close as possible to aa . In other words, the value should be minimum possible.

If there are many optimal solutions, Mister B should be satisfied with any of them.

输入格式

First and only line contains two space-separated integers nn and aa ( 3<=n<=1053<=n<=10^{5} , 1<=a<=1801<=a<=180 ) — the number of vertices in the polygon and the needed angle, in degrees.

输出格式

Print three space-separated integers: the vertices v1v_{1} , v2v_{2} , v3v_{3} , which form . If there are multiple optimal solutions, print any of them. The vertices are numbered from 11 to nn in clockwise order.

输入输出样例

  • 输入#1

    3 15
    

    输出#1

    1 2 3
    
  • 输入#2

    4 67
    

    输出#2

    2 1 3
    
  • 输入#3

    4 68
    

    输出#3

    4 1 2
    

说明/提示

In first sample test vertices of regular triangle can create only angle of 6060 degrees, that's why every possible angle is correct.

Vertices of square can create 4545 or 9090 degrees angles only. That's why in second sample test the angle of 4545 degrees was chosen, since |45-67|<|90-67| . Other correct answers are: "3 1 2", "3 2 4", "4 2 3", "4 3 1", "1 3 4", "1 4 2", "2 4 1", "4 1 3", "3 1 4", "3 4 2", "2 4 3", "2 3 1", "1 3 2", "1 2 4", "4 2 1".

In third sample test, on the contrary, the angle of 9090 degrees was chosen, since |90-68|<|45-68| . Other correct answers are: "2 1 4", "3 2 1", "1 2 3", "4 3 2", "2 3 4", "1 4 3", "3 4 1".

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