criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include<bits/stdc++.h>
using namespace std;
string s;
int l;
int mian()
{
    cin>>s;
    l=strlen(s);
    for(register int i=0;i<l;i++)
    {
        if(s[i]=='C')
        {
            for(register int j=i+1;j<l;j++)
            {
                if(s[j]=='F')
                {
                    cout<<"Yes";
                    return 0;
                }
            }
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:8:14: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'const char*'
    8 |     l=strlen(s);
      |              ^
      |              |
      |              std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/cstring:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:121,
                 from a.cc:1:
/usr/include/string.h:407:35: note:   initializing argument 1 of 'size_t strlen(const char*)'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
a.cc:9:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    9 |     for(register int i=0;i<l;i++)
      |                      ^
a.cc:13:30: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   13 |             for(register int j=i+1;j<l;j++)
      |                              ^
Language: C++

#include<bits/stdc++.h>
using namesapce std;
string s;
int main()
{
    cin>>s;
    for(int i=0;i<s.length();i++)
    {
        if(s[i]=='C')
        {
            for(int j=i+1;j<s.length();j++)
            {
                if(s[j]=='F')
                {
                    cout<<"Yes"<<endl;
                    return 0;
                }
            }
        }
    }
    cout<<"No"<<endl;
    return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namesapce'
    2 | using namesapce std;
      |       ^~~~~~~~~
a.cc:3:1: error: 'string' does not name a type; did you mean 'stdin'?
    3 | string s;
      | ^~~~~~
      | stdin
a.cc: In function 'int main()':
a.cc:6:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |     cin>>s;
      |     ^~~
      |     std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:10: error: 's' was not declared in this scope
    6 |     cin>>s;
      |          ^
a.cc:15:21: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   15 |                     cout<<"Yes"<<endl;
      |                     ^~~~
      |                     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:15:34: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   15 |                     cout<<"Yes"<<endl;
      |                                  ^~~~
      |                                  std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:21:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   21 |     cout<<"No"<<endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:21:17: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   21 |     cout<<"No"<<endl;
      |                 ^~~~
      |                 std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	int a=0;
	cin>>s;
	for(int i=0;i<s.length();i++)
	{
		if(s[i]=='C')
		a=1;
		if(a[i]=='F'&&a=1)
		{
			cout<<"Yes";
			return 0;
		}
	}
	cout<<"No";
	return 0;
 } 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: invalid types 'int[int]' for array subscript
   12 |                 if(a[i]=='F'&&a=1)
      |                     ^
Language: C

char *S[]={"No","Yes"};
char C="CF";
char c;
int f;
int main(){
  while((c=getchar())!=10){
    f+=c==C[f];
  }
  f=f==2;
  puts(S[f]);
}

Compiler output:
main.c:2:8: error: initialization of 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    2 | char C="CF";
      |        ^~~~
main.c:2:8: error: initializer element is not computable at load time
main.c: In function 'main':
main.c:6:12: error: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
    6 |   while((c=getchar())!=10){
      |            ^~~~~~~
main.c:1:1: note: 'getchar' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
  +++ |+#include <stdio.h>
    1 | char *S[]={"No","Yes"};
main.c:7:12: error: subscripted value is neither array nor pointer nor vector
    7 |     f+=c==C[f];
      |            ^
main.c:10:3: error: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
   10 |   puts(S[f]);
      |   ^~~~
main.c:10:3: note: include '<stdio.h>' or provide a declaration of 'puts'
Language: C

char *S[]={"No","Yes"};
char C="CF";
char f;
int main(){
  while((c=getchar())!=10){
    f+=c==C[f];
  }
  f=f==2;
  puts(S[f]);
}

Compiler output:
main.c:2:8: error: initialization of 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    2 | char C="CF";
      |        ^~~~
main.c:2:8: error: initializer element is not computable at load time
main.c: In function 'main':
main.c:5:10: error: 'c' undeclared (first use in this function)
    5 |   while((c=getchar())!=10){
      |          ^
main.c:5:10: note: each undeclared identifier is reported only once for each function it appears in
main.c:5:12: error: implicit declaration of function 'getchar' [-Wimplicit-function-declaration]
    5 |   while((c=getchar())!=10){
      |            ^~~~~~~
main.c:1:1: note: 'getchar' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
  +++ |+#include <stdio.h>
    1 | char *S[]={"No","Yes"};
main.c:6:12: error: subscripted value is neither array nor pointer nor vector
    6 |     f+=c==C[f];
      |            ^
main.c:9:3: error: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
    9 |   puts(S[f]);
      |   ^~~~
main.c:9:3: note: include '<stdio.h>' or provide a declaration of 'puts'
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s[100];
    for(int i=1;i<=101;i++)
    {
        cin>>a[i];
        if(a[i]=='C'&&a[i+1]=='F')
        cout<<"YES";
        else cout<<"NO";
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'a' was not declared in this scope
    8 |         cin>>a[i];
      |              ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
string s;
int main ()
{
	cin>>s;
	int flag1=0,flag2=0;
	for(int i=0;i<=s.size()-1;++i)
	{
		if(s[i]=='C') flag1=1;
		if(s[i]=='F' && flag1) flag2=1;
	}
	if(flag2) puts("Yes");
	else put("No");
	return 0;	
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:14:14: error: 'put' was not declared in this scope; did you mean 'putw'?
   14 |         else put("No");
      |              ^~~
      |              putw
Language: C++

#include <bits/stdc++.h>
using namespace std;
string s;
int main ()
{
	cin>>s;
	int flag1=0,flag2=0;
	for(int i=0;i<=s.size-1;++i)
	{
		if(s[i]=='C') flag1=1;
		if(s[i]=='F' && flag1) flag2=1;
	}
	if(flag2) puts("Yes");
	else put("No");
	return 0;	
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:8:26: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    8 |         for(int i=0;i<=s.size-1;++i)
      |                        ~~^~~~
      |                              ()
a.cc:14:14: error: 'put' was not declared in this scope; did you mean 'putw'?
   14 |         else put("No");
      |              ^~~
      |              putw
Language: C++

#include<bits/stdc++.h>//'三玖是天！ '.
using namespace std;
string s;
int l;
int mian()
{
    cin>>s;
    l=s.size();
    for(register int i=0;i<l;i++)
    {
        if(s[i]=='C')
        {
            for(register int j=i+1;j<l;j++)
            {
                if(s[j]=='F')
                {
                    cout<<"Yes";
                    return 0;
                }
            }
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:9:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    9 |     for(register int i=0;i<l;i++)
      |                      ^
a.cc:13:30: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   13 |             for(register int j=i+1;j<l;j++)
      |                              ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
string s;
int l;
int main()
{
    cin>>s;
    l=s.leng();
    for (register int i(0);i<l;++i)
        if (s[i]=='C')
            for (register int j(i+1);j<l;++j)
                if (s[j]=='F')
                {
                    printf("Yes");
                    return 0;
                }
    printf("No");
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'leng'
   10 |     l=s.leng();
      |         ^~~~
a.cc:11:23: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   11 |     for (register int i(0);i<l;++i)
      |                       ^
a.cc:13:31: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   13 |             for (register int j(i+1);j<l;++j)
      |                               ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	char a[1001],c=0,f=0;
	gets(a);
	for(i=0;i<strlen(a);i++){
		if(a[i]=='C')
			c=1;
		if(c==1 and a[i]=='F')
			f=1;
	}
	if(f=1)
		cout<<"Yes";
	else
		cout<<"No";
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    5 |         gets(a);
      |         ^~~~
      |         getw
a.cc:6:13: error: 'i' was not declared in this scope
    6 |         for(i=0;i<strlen(a);i++){
      |             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string a;
	int f;
	cin>>a;
	for(int i=1;i<=n.length();i++)
	{
		if(a[i]=='C')
			f=0;
		if(!f&&a[i]=='F')
		{
			cout<<"Yes";
			return 0;
		} 
	}
	cout<<"No";
	return 0;	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: 'n' was not declared in this scope
    8 |         for(int i=1;i<=n.length();i++)
      |                        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string n;
	int f;
	cin>>n;
	for(i=1;i<=n.length();i++)
	{
		if(a[i]=='C')
			f=0;
		if(!f&&a[i]=='F')
		{
			cout<<"Yes";
			return 0;
		} 
	}
	cout<<"No";
	return 0;	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'i' was not declared in this scope
    8 |         for(i=1;i<=n.length();i++)
      |             ^
a.cc:10:20: error: 'a' was not declared in this scope
   10 |                 if(a[i]=='C')
      |                    ^
a.cc:12:24: error: 'a' was not declared in this scope
   12 |                 if(!f&&a[i]=='F')
      |                        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string n;
	int f;
	cin>>n;
	for(i=1;i<=n.length;i++)
	{
		if(a[i]=='C')
			f=0;
		if(!f&&a[i]=='F')
		{
			cout<<"Yes";
			return 0;
		} 
	}
	cout<<"No";
	return 0;	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'i' was not declared in this scope
    8 |         for(i=1;i<=n.length;i++)
      |             ^
a.cc:10:20: error: 'a' was not declared in this scope
   10 |                 if(a[i]=='C')
      |                    ^
a.cc:12:24: error: 'a' was not declared in this scope
   12 |                 if(!f&&a[i]=='F')
      |                        ^
Language: C++

#include<bits/stdc++.h>
#include<conio.h>
using namespace std;
int main() {
	char str[10001];
	bool f1=false,f2=false;
	scanf("%s",str+1);
	for(int i=1; i<=strlen(str+1); i++) {
		if(str[i]=='C'&&!f2)f1=true;
		if(str[i]=='F'&& f1)f2=true;
	}
	cout<<(f1&&f2?"YES":"NO");
	return 0;
}

Compiler output:
a.cc:2:9: fatal error: conio.h: No such file or directory
    2 | #include<conio.h>
      |         ^~~~~~~~~
compilation terminated.
Language: C++

implicit none
integer(8) :: i,l
character :: s*105
logical :: c,f
read*,s
c = .false.
f = .false.
l = len(trim(s))
do i = 1,l
	if(s(i:i)=='C')then
		c = .true.
	else if(s(i:i)=='F' .and. c)then
		f = .true.
	endif
enddo
if(c .and. f)then
	write(*,'(a)')'Yes'
else
	write(*,'(a)')'No'
endif
end

Compiler output:
a.cc:17:17: warning: multi-character character constant [-Wmultichar]
   17 |         write(*,'(a)')'Yes'
      |                 ^~~~~
a.cc:17:23: warning: multi-character character constant [-Wmultichar]
   17 |         write(*,'(a)')'Yes'
      |                       ^~~~~
a.cc:19:17: warning: multi-character character constant [-Wmultichar]
   19 |         write(*,'(a)')'No'
      |                 ^~~~~
a.cc:19:23: warning: multi-character character constant [-Wmultichar]
   19 |         write(*,'(a)')'No'
      |                       ^~~~
a.cc:1:1: error: 'implicit' does not name a type; did you mean 'explicit'?
    1 | implicit none
      | ^~~~~~~~
      | explicit
Language: C++

#include<bits/stdc++.h>
using namespace std;
int l,i,j;
char a[1100];
int main(){
    gets(a);
    l=srelen(a);
    for(i=0;i<l;i++){
        if(a[i]=='C')break;
    }
    for(j=i+1;j<l;j++){
        if(a[i]=='F'){
            cout<<"Yes";
            return 0;
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    6 |     gets(a);
      |     ^~~~
      |     getw
a.cc:7:7: error: 'srelen' was not declared in this scope; did you mean 'strnlen'?
    7 |     l=srelen(a);
      |       ^~~~~~
      |       strnlen
Language: C++

#include<bits/stdc++.h>
main()
{
    char a[123];gets(a);
    register int i=0;
    for(;a[i];++i)if(a[i]=='C')break;
    if(!a[i]){puts("No");return 0;}
    for(++i;a[i];++i)if(a[i]=='F')break;
    if(!a[i]){puts("No");return 0;}
    puts("Yes");
}

Compiler output:
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:4:17: error: 'gets' was not declared in this scope; did you mean 'getw'?
    4 |     char a[123];gets(a);
      |                 ^~~~
      |                 getw
a.cc:5:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    5 |     register int i=0;
      |                  ^
Language: C++

#include<stdio.h>
main()
{
    char a[123];gets(a);
    register int i=0;
    for(;a[i];++i)if(a[i]=='C')break;
    if(!a[i]){puts("No");return 0;}
    for(++i;a[i];++i)if(a[i]=='F')break;
    if(!a[i]){puts("No");return 0;}
    puts("Yes");
}

Compiler output:
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:4:17: error: 'gets' was not declared in this scope; did you mean 'getw'?
    4 |     char a[123];gets(a);
      |                 ^~~~
      |                 getw
a.cc:5:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    5 |     register int i=0;
      |                  ^
Language: C++

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
using namespace std;
char s[105];
int mian()
{
    cin>>s;
    int lens=strlen(s);
    for(int i=0;i<lens;i++)
    {
        if(s[i]=='C')
        {
            for(int j=i+1;j<lens;j++)
            {
                if(s[j]=='F')
                {
                    cout<<"Yes";
                    return 0;
                }
            }
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
using namespace std;
char s[105];
int mian()
{
    cin>>s;
    int lens=strlen(s);
    for(int i=0;i<lens;i++)
    {
        if(s[i]=='C')
        {
            for(int j=i+1;j<lenc;j++)
            {
                if(s[j]=='F')
                {
                    cout<<"Yes";
                    return 0;
                }
            }
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:15:29: error: 'lenc' was not declared in this scope; did you mean 'lens'?
   15 |             for(int j=i+1;j<lenc;j++)
      |                             ^~~~
      |                             lens
Language: C++

#include<iostream>
#include<cstring>
using namespace std;
int main()
{
	char str[101];
	gets(str);
	for(int i=0;i<strlen(str);i++){
		if(str[i]=='C'){
			for(int j=i+1;j<strlen(str);j++){
				if(str[j]=='F'){
					cout<<"Yes"<<"\n";
					return 0;
				}
			}
		}
	}
	cout<<"No"<<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |         gets(str);
      |         ^~~~
      |         getw
Language: C++

include<iostream>
#include<cstring>
using namespace std;

string a,b="CF"; //打表
int al,bl;

int main(){
    getline(cin,a);
    al=a.length();
    for(int i=0;i<al;i++)
        if(a[i]==b[bl]){ //当找到一个的时候加一
            bl++;
            if(bl==2)   //都找到的时候就退出
                break;
        }
    if(bl==2) cout<<"Yes"; //判断并且输出
    else cout<<"No";
    cout<<endl;//最后不要忘了打个换行
    return 0;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<iostream>
      | ^~~~~~~
a.cc:5:1: error: 'string' does not name a type
    5 | string a,b="CF"; //打表
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:9:13: error: 'cin' was not declared in this scope
    9 |     getline(cin,a);
      |             ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<cstring>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:9:17: error: 'a' was not declared in this scope; did you mean 'al'?
    9 |     getline(cin,a);
      |                 ^
      |                 al
a.cc:9:5: error: 'getline' was not declared in this scope
    9 |     getline(cin,a);
      |     ^~~~~~~
a.cc:12:18: error: 'b' was not declared in this scope
   12 |         if(a[i]==b[bl]){ //当找到一个的时候加一
      |                  ^
a.cc:17:15: error: 'cout' was not declared in this scope
   17 |     if(bl==2) cout<<"Yes"; //判断并且输出
      |               ^~~~
a.cc:17:15: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:18:10: error: 'cout' was not declared in this scope
   18 |     else cout<<"No";
      |          ^~~~
a.cc:18:10: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:19:5: error: 'cout' was not declared in this scope
   19 |     cout<<endl;//最后不要忘了打个换行
      |     ^~~~
a.cc:19:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:19:11: error: 'endl' was not declared in this scope
   19 |     cout<<endl;//最后不要忘了打个换行
      |           ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<cstring>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C++

#include<iostream>
#include<cstring>
using namespace std;
bool a=0,b=0,c,d,e,f;
int main()
{	char s[100];
	gets(s);
	for(int i=0;i<strlen(s);++i)
	{if(s[i]=='C')a=1,c=i,e=c;
	if(s[i]=='F')b=1,d=i,f=d;
	}
	if(a==1&&b==1&&e<f)
	cout<<"Yes"<<endl;
	if(a!=1||b!=1||e>f)
	cout<<"N0"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |         gets(s);
      |         ^~~~
      |         getw
Language: C++

#include<iostream>
#include<cstring>
using namespace std;

bool a=0,b=0,c,d,e,f;
int main()
{	char s[100];
	gets(s);
	for(int i=0;i<strlen(s);++i)
	{if(s[i]=='C')a=1,c=i,e=c;
	if(s[i]=='F')b=1,d=i,f=d;
	}
	if(a==1&&b==1&&e<f)
	cout<<"Yes"<<endl;
	if(a!=1||b!=1||e>f)
	cout<<"N0"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    8 |         gets(s);
      |         ^~~~
      |         getw
Language: C++

#include<iostream>
#include<algorithm>
#include<cstring>
using namespace std;
int ans;
int main()
{
	string a;
	cin>>a;
	int k=a.length();
	for(int i=1;i<=k;i++)
	{
		if(a[i]=='C'&&ans=0)
		ans=1;
		if(a[i]=='F'&&ans==1)
		ans=2;
	}
	if(ans==2)
	cout<<"Yes"<<endl;
	else
	cout<<"No"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:29: error: lvalue required as left operand of assignment
   13 |                 if(a[i]=='C'&&ans=0)
Language: C++

#include<iostream>
#include<algorithm>
#include<cstring>
using namespace std;
int ans;
int main()
{
	string a;
	cin>>a;
	int k=a.length();
	for(int i=1;i<=k;i++)
	{
		if(a[i]=='C')
		ans=1;
		if(a[i]=='F'&&ans=1)
		ans=2;
	}
	if(ans==2)
	cout<<"Yes"<<endl;
	else
	cout<<"No"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:29: error: lvalue required as left operand of assignment
   15 |                 if(a[i]=='F'&&ans=1)
Language: C++

#include<bits/stdc++.h> 
using namespace std;
string s;
int mian()
{
    int len;
    cin>>str;
    l=str.size();
    for(i=0;i<l;i++)
    {
        if(str[i]=='C')
        {
            for(j=i+1;j<l;j++)
            {
                if(str[j]=='F')
                {
                    printf("Yes");
                    return 0;
                }
            }
        }
    }
    printf("No");
    return 0;
}


Compiler output:
a.cc: In function 'int mian()':
a.cc:7:10: error: 'str' was not declared in this scope; did you mean 'std'?
    7 |     cin>>str;
      |          ^~~
      |          std
a.cc:8:5: error: 'l' was not declared in this scope
    8 |     l=str.size();
      |     ^
a.cc:9:9: error: 'i' was not declared in this scope
    9 |     for(i=0;i<l;i++)
      |         ^
a.cc:13:17: error: 'j' was not declared in this scope
   13 |             for(j=i+1;j<l;j++)
      |                 ^
Language: C++

#include<bits\stdc++.h>
using namespace std;
string a;
int main()
{
	cin>>a;
	int n,s=0; 
	n=a.size();
	for(int i=0;i<n;++i)	
    {
		if(a[i]=='C') 
		{
			for(int j=i+1;j<n;j++)
            {
            	if(a[j]=='F')
            	{
            	    s++;
            	}
            }
        
		}
	}
	if(s!=0)
	 cout<<"YES";
	else
	 cout<<"NO";
	return 0;
}

Compiler output:
a.cc:1:9: fatal error: bits\stdc++.h: No such file or directory
    1 | #include<bits\stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
string s;
int l;
int mian() {
    cin >> s;
    l = s.size();
    for (int i = 0; i < l; i++) {
        if (s[i] == 'C') {
            for (int j = i + 1; j < l; j++) {
                if (s[j] == 'F') {
                    cout << "Yes";
                    return 0;
                }
            }
        }
    }
    cout << "No";
    return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h>
using namespace std;
bool x=0,y=0;
char a;
int main()
{
    while（a!=EOF)
    {
        a=getchar();
        if(a=='C') x=1;
        if(a=='F'&&x) y=1;
    }
    if(x&&y) cout<<"Yes";
    else cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'while\U0000ff08a' was not declared in this scope
    7 |     while（a!=EOF)
      |     ^~~~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
bool x=0,y=0;
char a;
int main()
{
    while（a!='\n')
    {
        a=getchar();
        if(a=='C') x=1;
        if(a=='F'&&x) y=1;
    }
    if(x&&y) cout<<"Yes";
    else cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'while\U0000ff08a' was not declared in this scope
    7 |     while（a!='\n')
      |     ^~~~~~~~
Language: C++

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
string s;
int l;
int mian() {
	cin>>s;
	l=s.size();
	for(register int i=0; i<l; i++) {
		if(s[i]=='C') {
			for(register int j=i+1; j<l; j++) {
				if(s[j]=='F') {
					cout<<"Yes"<<endl;
					return 0;
				}
			}
		}
	}
	cout<<"No"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:10:26: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   10 |         for(register int i=0; i<l; i++) {
      |                          ^
a.cc:12:42: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   12 |                         for(register int j=i+1; j<l; j++) {
      |                                          ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <bits/stdc++.h>
using namespace std;
bool a==false;
char s[500];
int main()
{
	cin>>s;
	for(int i=0;i<strlen(s);i++)
	{
		if(s[i]=='F' && a==true)
		{
			cout<<"YES";
			return 0;
		}
		if(s[i]=='C')
		{
			a=true;
		}
	}
	cout<<"NO";
	return 0;
}

Compiler output:
a.cc:3:7: error: expected initializer before '==' token
    3 | bool a==false;
      |       ^~
a.cc: In function 'int main()':
a.cc:10:33: error: 'a' was not declared in this scope
   10 |                 if(s[i]=='F' && a==true)
      |                                 ^
a.cc:17:25: error: 'a' was not declared in this scope
   17 |                         a=true;
      |                         ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
char s[1005];
int main()
{
    gets(s); 
    int g=str.len(s);
    for(int i=0;i<g;i++)
    {
        if(s[i]='C')
        {
            for(int j=i;j<g;j++)
            {
                if(s[j]=='F')
                {
                    printf("Yes");
                    return 0;
                }
            }
            printf("No");
            return 0;
        }
    }
    printf("No");
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    6 |     gets(s);
      |     ^~~~
      |     getw
a.cc:7:11: error: 'str' was not declared in this scope; did you mean 'std'?
    7 |     int g=str.len(s);
      |           ^~~
      |           std
Language: C++

#include<bits/stdc++.h>
using namespace std;
char s[1005];
int main()
{
    gets(s); 
    int g=str.len();
    for(int i=0;i<g;i++)
    {
        if(s[i]='C')
        {
            for(int j=i;j<g;j++)
            {
                if(s[j]=='F')
                {
                    printf("Yes");
                    return 0;
                }
            }
            printf("No");
            return 0;
        }
    }
    printf("No");
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    6 |     gets(s);
      |     ^~~~
      |     getw
a.cc:7:11: error: 'str' was not declared in this scope; did you mean 'std'?
    7 |     int g=str.len();
      |           ^~~
      |           std
Language: C

#include<stdio.h>
#include<string.h>
using namespace std;
char a;
int flag;
int main()
{
    a=getchar();
    while(a!=10)
    {
        if(flag==0)
        {
            if(a='C')
              flag++;
        }
        else
          if(a='F')
            flag++;
        a=getchar();
    }
    if(flag>=2)
      printf("是");
    else
      printf("不是");
    return 0;
}

Compiler output:
main.c:3:1: error: unknown type name 'using'
    3 | using namespace std;
      | ^~~~~
main.c:3:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    3 | using namespace std;
      |                 ^~~
Language: C

#include<stdio.h>
#include<algorithm>
#include<cstring>
using namespace std;
char a;
int flag;
int main()
{
    a=getchar();
    while(a!=10)
    {
        if(flag==0)
        {
            if(a='C')
              flag++;
        }
        else
          if(a='F')
            flag++;
        a=getchar();
    }
    if(flag>=2)
      printf("是");
    else
      printf("不是");
    return 0;
}

Compiler output:
main.c:2:9: fatal error: algorithm: No such file or directory
    2 | #include<algorithm>
      |         ^~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    string a;
    int idx;
    bool f1,f2;
    f1=f2=false;
    cin>>a;
    for(int i=0;i<a.size();i++){
        if(a[i]=='C')f1=1,idx=i,break;
    }
    if(!f1){
        cout<<"No"<<endl;
        return 0;
    }else{
        for(int i=idx;i<a.size();i++){
            if(a[i]=='F')f2=1,break;
        }
    }
    if(f2){
        cout<<"Yes"<<endl;
        
    }else{
        cout<<"No"<<endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:33: error: expected primary-expression before 'break'
   10 |         if(a[i]=='C')f1=1,idx=i,break;
      |                                 ^~~~~
a.cc:17:31: error: expected primary-expression before 'break'
   17 |             if(a[i]=='F')f2=1,break;
      |                               ^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    string a;
    int idx;
    bool f1,f2;
    f1=f2=false;
    cin>>a;
    for(int i=0;i<n.size();i++){
        if(a[i]=='C')f1=1,idx=i,break;
    }
    if(!f1){
        cout<<"No"<<endl;
        return 0;
    }else{
        for(int i=idx;i<a.size();i++){
            if(a[i]=='F')f2=1,break;
        }
    }
    if(f2){
        cout<<"Yes"<<endl;
        
    }else{
        cout<<"No"<<endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: 'n' was not declared in this scope
    9 |     for(int i=0;i<n.size();i++){
      |                   ^
a.cc:10:33: error: expected primary-expression before 'break'
   10 |         if(a[i]=='C')f1=1,idx=i,break;
      |                                 ^~~~~
a.cc:17:31: error: expected primary-expression before 'break'
   17 |             if(a[i]=='F')f2=1,break;
      |                               ^~~~~
Language: C++

#include<cstdio>
#include<cmath>
#include<algorithm>
#include<cctype>
#include<cstring>
#include<queue>
#include<iostream>
#include<map>
using namespace std;
typedef long long ll;
typedef double lf;
typedef unsigned un;
typedef int in;
#define mian main
#define maxn 10000+10
#define maxm 10000+10
#define _(a) read(a)
#define non void
#define inf 2147483647
#define bre break
#define con continue
#define prq priority_queue
#define re register
#define bu bool
#define cz char
#define cst const
#define ope operator
#define inl inline
#define upp upper_bound
#define low lower_bound
#define next_per next_permutation
cz obuf[1<<23],*O=obuf,buf[1<<23],*L=buf,*R=buf;
inl cz gc(){return L==R&&(R=(L=buf)+fread(buf,1,100000,stdin),L==R)?EOF:*L++;}
template<typename T>inl T Max(T a,T b){return a>b?a:b;}
template<typename T>inl T Min(T a,T b){return a<b?a:b;}
template<typename T>inl T Abs(T a){return a<0?-a:a;}
template<typename T>inl non read(T &a){a=0;T k=1;char c=gc();while(c<'0'||c>'9')k=c=='-'?-1:k,c=gc();while(c>='0'&&c<='9')a=a*10+(c^48),c=gc();if(c!='.'){a*=k;return;}T t=0.1;while(c<'0'||c>'9')c=gc();while(c>='0'&&c<='9')a+=t*(c^48),c=gc(),t*=0.1;a*=k;}
template<typename T>non print(T x){if(x>9)print(x/10);*O++=x%10+'0';}
template<typename T>non out(T a,cz t='\n'){print(a);*O++=t;}
non fresh(){fwrite(obuf,O-obuf,1,stdout);}
string s;
in n,i;
bu a;
in main()
{
	cin>>s;
	n=s.size();
	for(i=0;i<n;++i)if(s[i]=='C')bre;
	for(;i<n;++i)if(s[i]=='F')a=1;
	if(a)*O++'Y',*O++='e',*O++='s';
	else *O++='N',*O++='o';
	*O++='\n',fresh();
	//freopen("a.in","r",stdin);
	//freopen(".out","w",stdout);
}


Compiler output:
a.cc: In function 'in main()':
a.cc:50:18: error: expected ';' before 'Y'
   50 |         if(a)*O++'Y',*O++='e',*O++='s';
      |                  ^~~
      |                  ;
Language: C++

#include<bits/stdc++.h>
using namespace std;

const int M=105;
char a[M];
bool C=false,F=false;

int main()
{
	gets(a);
	int lne=strlen(a);
	for (int i=0;i<len;++i)
		if (a[i]=='C')
			c=true;
		else if (C&&a[i]=='F')
			F=true;
	if (F)
		cout<<"Yes";
	else
		cout<<"No";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   10 |         gets(a);
      |         ^~~~
      |         getw
a.cc:12:24: error: 'len' was not declared in this scope; did you mean 'lne'?
   12 |         for (int i=0;i<len;++i)
      |                        ^~~
      |                        lne
a.cc:14:25: error: 'c' was not declared in this scope
   14 |                         c=true;
      |                         ^
Language: C++

#include <iostream>
#include <cstring>
using namespace std;
int mian(){
	char s[105];
	cin >> s;
	int len = strlen(s);
	bool flagc = false;
	bool flagf = false;
	bool flags = false;
	for(int i = 0; i < len; i++){
		if(s[i] == 'C'){
			flagc = true;
		}
		if(s[i] == 'F'){
			flagf = true;
		}
		if(flagc == true && flagf == false){
			flags = true;
		}
	}
	if(flagc == true && flagf == true && flags == true){
		cout << "Yes";
	}else{
		cout << "No";
	}
	return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h>
using namespace std;
char s[105];
int i,j;
int main()
{
    gets(s);
    for(i=0;i<strlen(s);i++)
    if(a[i]=='C')
    {
        for(j=i+1;j<strlen(s);j++)
        if(a[j]=='F')
        {
            cout<<"Yes";
            return 0;
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(s);
      |     ^~~~
      |     getw
a.cc:9:8: error: 'a' was not declared in this scope
    9 |     if(a[i]=='C')
      |        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
string s;
int l;
int mian() {
	cin>>s;
	l=s.size();
	for(register int i=0; i<l; i++) {
		if(s[i]=='C') {
			for(register int j=i+1; j<l; j++) {
				if(s[j]=='F') {
					cout<<"Yes";
					return 0;
				}
			}
		}
	}
	cout<<"No";
	return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:8:26: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    8 |         for(register int i=0; i<l; i++) {
      |                          ^
a.cc:10:42: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   10 |                         for(register int j=i+1; j<l; j++) {
      |                                          ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int main(){
	char a[10000];
	int b=0,c=0,l=0;
	cin>>a;
	b=strlen(a);
	for(int i=0;i<b;i++){
		if(a[i]=='C'){
			c++; 
			l=1;
		}else if(a[i]=='F'){
			c++;
			l=0;
		}
	}
	if(c>0&&l=0) cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:15: error: lvalue required as left operand of assignment
   19 |         if(c>0&&l=0) cout<<"Yes"<<endl;
      |            ~~~^~~
Language: C++

#include<iostream>
#include<cstring>
using namespace std;
char s[101];
int i,k,j;
int main(){
	cin>>s;
	for(i=0;i<strlen(s);i++){
		if(s[i]=='C'){
			for(j=i+1;j<l;j++){
				if(s[j]=='F'){
                    cout<<"Yes";
                    return 0;
				}
			}
		}
	}
	cout<<"No";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:37: error: 'l' was not declared in this scope
   10 |                         for(j=i+1;j<l;j++){
      |                                     ^
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main(void){
  int i, j;
  string s;
  cin >> s;
  for(int p: s){
    if(s.at(p)=='C'){
      i = p;
    }
    if(s.at(p)=='F'){
      j = q;
    }
  }
  if(i<j){
    cout << "Yes" << endl;
  }else{
    cout << "No" << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:11: error: 'q' was not declared in this scope
   15 |       j = q;
      |           ^
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>
#include <queue>

using namespace std;

int main(void){
	string s;
	cin >> s;
	int c_location = -1;
	int f_location = -1;
	for(int i=0: s){
		if(s.at(i)=='C'){
			for(int j=i:s){
				if(s.at(j)=='F'){
					cout << "Yes" << endl;
				}
			}
		}
	}
	cout << "no" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:18: error: initializer in range-based 'for' loop
   18 |         for(int i=0: s){
      |                  ^
a.cc:20:34: error: initializer in range-based 'for' loop
   20 |                         for(int j=i:s){
      |                                  ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>

using namespace std;

int main(void){
	string s;
	cin >> s;
	int n = s.length();
	for(char c: n){
		if(c=='C'){
			for(char d=c:n){
				if(d=='F'){
					cout << "Yes" << endl;
					exit(0);
				}
			}
			cout << "No" << endl;
			exit(0);
		}
	}
	cout << "No" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:21: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   16 |         for(char c: n){
      |                     ^
      |                     std::begin
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:114:37: note: 'std::begin' declared here
  114 |   template<typename _Tp> const _Tp* begin(const valarray<_Tp>&) noexcept;
      |                                     ^~~~~
a.cc:16:21: error: 'end' was not declared in this scope; did you mean 'std::end'?
   16 |         for(char c: n){
      |                     ^
      |                     std::end
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:18:35: error: initializer in range-based 'for' loop
   18 |                         for(char d=c:n){
      |                                   ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>

using namespace std;

int main(void){
	string s;
	cin >> s;
	int n = s.length();
	for(char c: n{
		if(c=='C'){
			for(char d=c:n{
				if(d=='F'){
					cout << "Yes" << endl;
					exit(0);
				}
			}
			cout << "No" << endl;
			exit(0);
		}
	}
	cout << "No" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:21: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   16 |         for(char c: n{
      |                     ^
      |                     std::begin
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:114:37: note: 'std::begin' declared here
  114 |   template<typename _Tp> const _Tp* begin(const valarray<_Tp>&) noexcept;
      |                                     ^~~~~
a.cc:16:21: error: 'end' was not declared in this scope; did you mean 'std::end'?
   16 |         for(char c: n{
      |                     ^
      |                     std::end
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:16:22: error: expected ')' before '{' token
   16 |         for(char c: n{
      |            ~         ^
      |                      )
a.cc:18:35: error: initializer in range-based 'for' loop
   18 |                         for(char d=c:n{
      |                                   ^
a.cc:18:39: error: expected ')' before '{' token
   18 |                         for(char d=c:n{
      |                            ~          ^
      |                                       )
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>

using namespace std;

int main(void){
	string s;
	cin >> s;
	for(char c: s.length()){
		if(c=='C'){
			for(char d=c:s.length()){
				if(d=='F'){
					cout << "Yes" << endl;
					exit(0);
				}
			}
			cout << "No" << endl;
			exit(0);
		}
	}
	cout << "No" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:30: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   15 |         for(char c: s.length()){
      |                              ^
      |                              std::begin
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:114:37: note: 'std::begin' declared here
  114 |   template<typename _Tp> const _Tp* begin(const valarray<_Tp>&) noexcept;
      |                                     ^~~~~
a.cc:15:30: error: 'end' was not declared in this scope; did you mean 'std::end'?
   15 |         for(char c: s.length()){
      |                              ^
      |                              std::end
/usr/include/c++/14/bits/range_access.h:116:37: note: 'std::end' declared here
  116 |   template<typename _Tp> const _Tp* end(const valarray<_Tp>&) noexcept;
      |                                     ^~~
a.cc:17:35: error: initializer in range-based 'for' loop
   17 |                         for(char d=c:s.length()){
      |                                   ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstdlib>
#include <thread>
#include <chrono>

using namespace std;

int main(void){
	string s;
	cin >> s;

	for(char c: n){
		if(c=='C'){
			for(char d=c:n){
				if(d=='F'){
					cout << "Yes" << endl;
					exit(0);
				}
			}
			cout << "No" << endl;
			exit(0);
		}
	}
	cout << "No" << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:21: error: 'n' was not declared in this scope
   16 |         for(char c: n){
      |                     ^
a.cc:18:35: error: initializer in range-based 'for' loop
   18 |                         for(char d=c:n){
      |                                   ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
char p[3]="CF",c[1005];
int main()
{    ios::sync_with_stdio(false);
    int x=0;  
    gets(c); 
    for(int i=0;i<strlen(c);i++)
        if(c[i]==p[x]) x++;  
    if(x>=2) cout<<"YES"<<endl;  
    else cout<<"NO"<<endl;  
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(c);
      |     ^~~~
      |     getw
Language: C++

#include<bits/stdc++.h>
using namespace std;
char p[3]=" CF",c[1005];
int main()
{    ios::sync_with_stdio(false);
    int x=0;  
    gets(c); 
    for(int i=0;i<strlen(c);i++)
        if(c[i]==p[x]) x++;  
    if(x>=2) cout<<"YES"<<endl;  
    else cout<<"NO"<<endl;  
    return 0;
}

Compiler output:
a.cc:3:11: error: initializer-string for 'char [3]' is too long [-fpermissive]
    3 | char p[3]=" CF",c[1005];
      |           ^~~~~
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(c);
      |     ^~~~
      |     getw
Language: C++

#include<bits/stdc++.h>
using namespace std;
char p[6]=" CF",c[1005];
int main()
{    ios::sync_with_stdio(false);
    int x=0;  
    gets(c); 
    for(int i=0;i<strlen(c);i++)
        if(c[i]==p[x]) x++;  
    if(x>=2) cout<<"YES"<<endl;  
    else cout<<"NO"<<endl;  
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(c);
      |     ^~~~
      |     getw
Language: C++

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
string s;
int l;
int mian(){
    cin>>s;
    l=s.size();
    for(register int i=0;i<l;i++){
        if(s[i]=='C'){
            for(register int j=i+1;j<l;j++){
                if(s[j]=='F'){
                    cout<<"Yes";
                    return 0;
                }
            }
        }
    }
    cout<<"No";
    return 0;
}

Compiler output:
a.cc: In function 'int mian()':
a.cc:10:22: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   10 |     for(register int i=0;i<l;i++){
      |                      ^
a.cc:12:30: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   12 |             for(register int j=i+1;j<l;j++){
      |                              ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status