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图灵 OJTURING / ONLINE JUDGE

#F2819. Triangle

    ID: 2825 传统题 2000ms 256MiB 尝试: 0 已通过: 0 难度: (无) 上传者: 标签>待分类整理状态难度待定难度共享题库Codeforces英文题面题目来源题面语言

Triangle

题目描述

A. Triangle
time limit per test
2 seconds
memory limit per test
64 megabytes
input
standard input
output
standard output

At a geometry lesson Bob learnt that a triangle is called right-angled if it is nondegenerate and one of its angles is right. Bob decided to draw such a triangle immediately: on a sheet of paper he drew three points with integer coordinates, and joined them with segments of straight lines, then he showed the triangle to Peter. Peter said that Bob's triangle is not right-angled, but is almost right-angled: the triangle itself is not right-angled, but it is possible to move one of the points exactly by distance 1 so, that all the coordinates remain integer, and the triangle become right-angled. Bob asks you to help him and find out if Peter tricks him. By the given coordinates of the triangle you should find out if it is right-angled, almost right-angled, or neither of these.

Input

The first input line contains 6 space-separated integers x1,y1,x2,y2,x3,y3 − coordinates of the triangle's vertices. All the coordinates are integer and don't exceed 100 in absolute value. It's guaranteed that the triangle is nondegenerate, i.e. its total area is not zero.

Output

If the given triangle is right-angled, output RIGHT, if it is almost right-angled, output ALMOST, and if it is neither of these, output NEITHER.

Examples
Input
0 0 2 0 0 1
Output
RIGHT
Input
2 3 4 5 6 6
Output
NEITHER
Input
-1 0 2 0 0 1
Output
ALMOST

题目来源:fps-www.educg.net-codeforce-1-2833.xml.zip;FPS 共享题包,题包内第 2490 题。保留原作者与原赛事署名。