```
t = input()
```
直接出错，我就摊手了
by 恭叔与匠 @ 2020-03-02 17:29:27
学到了用异常判断的方法！！
```
import decimal
try :
a = input().split()
n = len(a)
ans = decimal.Decimal(0)
for i in range(n) :
ans += decimal.Decimal(a[i])
print(ans.quantize(decimal.Decimal('1.00000'),rounding=decimal.ROUND_HALF_UP))
except :
print('0.00000')
```
by 恭叔与匠 @ 2020-03-02 17:48:32