while 1:
try:
nums = input()
dp = []
cache = []
def format_(s):
if s:
# 去除小数点在末尾的情况 例如 9.
while 1:
try:
nums = input()
dp = []
cache = []
def format_(s):
if s:
# 去除小数点在末尾的情况 例如 9.