Score : 100 points
This contest is CODEFESTIVAL
, which can be shortened to the string CF
by deleting some characters.
Mr. Takahashi, full of curiosity, wondered if he could obtain CF
from other strings in the same way.
You are given a string s consisting of uppercase English letters.
Determine whether the string CF
can be obtained from the string s by deleting some characters.
A
-Z
).The input is given from Standard Input in the following format:
s
Print Yes
if the string CF
can be obtained from the string s by deleting some characters.
Otherwise print No
.
CODEFESTIVAL
Yes
CF
is obtained by deleting characters other than the first character C
and the fifth character F
.
FESTIVALCODE
No
FC
can be obtained but CF
cannot be obtained because you cannot change the order of the characters.
CF
Yes
It is also possible not to delete any characters.
FCF
Yes
CF
is obtained by deleting the first character.