二：程序设计题
1.
1 temp = input() 2 t = eval(temp) 3 if t == 0: 4 print("Hello World") 5 elif t > 0: 6 print("He\nll\no \nWo\nrl\nd") 7 elif t < 0: 8 print("H\ne\nl\nl\no\n \nW\no\nr\nl\nd\n")
2.
1 temp = input() 2 t = eval(temp) 3 print("{:.2f}".format(t))