codeforces 538 A.Cutting Banner

codeforces 538 A.Cutting Banner

 

A. Cutting Banner time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output

A large banner with word CODEFORCES was ordered for the 1000-th onsite round of Codeforcesω that takes place on the Miami beach. Unfortunately, the company that made the banner mixed up two orders and delivered somebody else's banner that contains someone else's word. The word on the banner consists only of upper-case English letters.

There is very little time to correct the mistake. All that we can manage to do is to cut out some substring from the banner, i.e. several consecutive letters. After that all the resulting parts of the banner will be glued into a single piece (if the beginning or the end of the original banner was cut out, only one part remains); it is not allowed change the relative order of parts of the banner (i.e. after a substring is cut, several first and last letters are left, it is allowed only to glue the last letters to the right of the first letters). Thus, for example, for example, you can cut a substring out from string 'TEMPLATE' and get string 'TEMPLE' (if you cut out string AT), 'PLATE' (if you cut outTEM), 'T' (if you cut out EMPLATE), etc.

Help the organizers of the round determine whether it is possible to cut out of the banner some substring in such a way that the remaining parts formed word CODEFORCES.

Input

The single line of the input contains the word written on the banner. The word only consists of upper-case English letters. The word is non-empty and its length doesn't exceed 100 characters. It is guaranteed that the word isn't word CODEFORCES.

Output

Print 'YES', if there exists a way to cut out the substring, and 'NO' otherwise (without the quotes).

Sample test(s) input

CODEWAITFORITFORCES

output

YES

input

BOTTOMCODER

output

NO

input

DECODEFORCES

output

YES

input

DOGEFORCES

output

NO

 

 

題目大意：給一個字符串，求切下一段後剩余部分是否等於“CODEFORCES”，能輸出“YES”，不能輸出NO。常見的字符串處理問題。用substr()函數處理即可。

 

代碼如下：

 

#include 
#include 
#include 
#include 
using namespace std;
int main()
{
	int n,p=0;
	string a;
	cin>>a;
	n=a.length();
	for(int i=0;i