题解 | 三角形判断

def triangle_check(a, b, c):
    if a + b <= c or a + c <= b or b + c <= a:
        return "Not a triangle!"
    else:
        if a == b == c:
            return "Equilateral triangle!"
        elif a == b and a != c or a == c and a != b or b == c and b != a:
            return "Isosceles triangle!"
        else:
            return "Ordinary triangle!"



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