Python判断三角形并计算面积

a, b, c = map(int, input().split()) 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', '{:.2f}'.format(area)) else: print('NO')