https://www.luogu.com.cn/problem/P5717
""" P5717 【深基3.习8】三角形分类(python3实现) https://www.luogu.com.cn/problem/P5717 """ import sys a=list(map(int,input().split())) a.sort() if a[0]+a[1]<=a[2]: print("Not triangle") sys.exit(0) if a[2]*a[2]==a[1]*a[1]+a[0]*a[0]: print("Right triangle") sys.exit(0) if(a[2]*a[2]>(a[1]*a[1]+a[0]*a[0])): print("Obtuse triangle") if(a[2]*a[2]<(a[1]*a[1]+a[0]*a[0])): print("Acute triangle"); if(a[1]==a[0] or a[2]==a[1] or a[0]==a[2]): print("Isosceles triangle"); if a[1]==a[2] and a[0]==a[1]: print("Equilateral triangle")