BC71 三角形判断

思路：

step1：输入三边；

step2：判断形状；打印输出；

代码如下：

while True:
    try:
        a,b,c = list(map(int,input().split()))
        if a+b>c and a+c>b and b+c>a:
            if (a == b and a != c ) or (a == c and a != b ) or (b == c and b != a ):
                print('Isosceles triangle!')
            elif a == b == c:
                print('Equilateral triangle!')
            else:
                print('Ordinary triangle!')
        else:
            print('Not a triangle!')
    except:
        break