#import <stdio.h>
#import <stdbool.h>
int main() {
	char S[102];
	char *s = S;
	scanf("%s",s);
	bool c = false;
	while(*s!='\0'){
		if(*s=='C') c = true;
		if(c&&*s=='F'){
			puts("Yes");
			return 0;
		}
		s++;
	}
	puts("No");
}
; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_890/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_890/source.m"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@.str = private unnamed_addr constant [3 x i8] c"%s\00", align 1
@.str.1 = private unnamed_addr constant [4 x i8] c"Yes\00", align 1
@.str.2 = private unnamed_addr constant [3 x i8] c"No\00", align 1

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @main() local_unnamed_addr #0 {
entry:
  %S = alloca [102 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 102, ptr nonnull %S) #3
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %S)
  br label %while.cond

while.cond:                                       ; preds = %if.end11, %entry
  %s.0 = phi ptr [ %S, %entry ], [ %incdec.ptr, %if.end11 ]
  %c.0 = phi i8 [ 0, %entry ], [ %c.122, %if.end11 ]
  %0 = load i8, ptr %s.0, align 1, !tbaa !5
  switch i8 %0, label %if.end [
    i8 0, label %cleanup
    i8 67, label %if.end11
  ]

if.end:                                           ; preds = %while.cond
  %1 = and i8 %c.0, 1
  %tobool.not = icmp ne i8 %1, 0
  %cmp7 = icmp eq i8 %0, 70
  %or.cond = and i1 %tobool.not, %cmp7
  br i1 %or.cond, label %cleanup, label %if.end11

if.end11:                                         ; preds = %while.cond, %if.end
  %c.122 = phi i8 [ %c.0, %if.end ], [ 1, %while.cond ]
  %incdec.ptr = getelementptr inbounds i8, ptr %s.0, i64 1
  br label %while.cond

cleanup:                                          ; preds = %while.cond, %if.end
  %.str.2.sink = phi ptr [ @.str.1, %if.end ], [ @.str.2, %while.cond ]
  %call12 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %.str.2.sink)
  call void @llvm.lifetime.end.p0(i64 102, ptr nonnull %S) #3
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nofree nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.linker.options = !{}
!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"Ubuntu clang version 18.0.0 (++20231007042255+8abb2ace888b-1~exp1~20231007042414.1230)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
