Python 判断三个数能否构成三角形并计算面积

a = float(input()) b = float(input()) c = float(input())

if a + b > c and a + c > b and b + c > a: p = (a + b + c) / 2 area = (p * (p - a) * (p - b) * (p - c)) ** 0.5 print('YES') print('{:.2f}'.format(area)) else: print('NO')