WTF?

``` HAI I HAS A TUX GIMMEH TUX I HAS A FOO ITS 0 I HAS A BAR ITS 0 I HAS A BAZ ITS 0 I HAS A QUZ ITS 1 TUX IS NOW A NUMBR IM IN YR LOOP NERFIN YR TUX TIL BOTH SAEM TUX AN 0 I HAS A PUR GIMMEH PUR PUR IS NOW A NUMBR FOO R SUM OF FOO AN PUR BAR R SUM OF BAR AN 1 BOTH SAEM BIGGR OF PRODUKT OF FOO AN QUZ AN PRODUKT OF BAR BAZ AN PRODUKT OF FOO AN QUZ O RLY? YA RLY BAZ R FOO QUZ R BAR OIC IM OUTTA YR LOOP BAZ IS NOW A NUMBAR VISIBLE SMOOSH QUOSHUNT OF BAZ QUZ KTHXBYE ```

The input contains between 1 and 10 lines, $ i $ -th line contains an integer number $ x_{i} $ $ (0<=x_{i}<=9) $ .

Output a single real number. The answer is considered to be correct if its absolute or relative error does not exceed $ 10^{-4} $ .

3
0
1
1

0.666667