题解 | #三角形判断#

while True:
    try:
        a, b, c = map(int, input().split())

        if a + b > c and b + c > a and a + c > b:
                if(a == b and a == c):
                    msg = "Equilateral triangle!"
                elif(a == b or a == c or c == b):
                    msg = "Isosceles triangle!"
                else:
                    msg = "Ordinary triangle!"
        else:
            msg = "Not a triangle!"
        print(msg)
    except:
        break