#import <stdio.h>
int main(){
    char s[250] = {'\0'};
    scanf("%s",s);
    unsigned long n = strlen(s);
    for(int i=n/2-1;i>=1;i--) {
        char a[250] = {'\0'};
        char b[250] = {'\0'};
        strncpy(a, s, i);
        strncpy(b, s+i, i);
        if(strcmp(a,b)==0){
            printf("%d",2*i);
            return 0;
        }
    }
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_755/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_755/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 [3 x i8] c"%d\00", align 1

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @main() local_unnamed_addr #0 {
entry:
  %s = alloca [250 x i8], align 16
  %a = alloca [250 x i8], align 16
  %b = alloca [250 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 250, ptr nonnull %s) #6
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(250) %s, i8 0, i64 250, i1 false)
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %s)
  %call2 = call i64 @strlen(ptr noundef nonnull dereferenceable(1) %s)
  %div32 = lshr i64 %call2, 1
  %0 = trunc i64 %div32 to i32
  %i.034 = add i32 %0, -1
  %cmp35 = icmp sgt i32 %i.034, 0
  br i1 %cmp35, label %for.body.preheader, label %cleanup19

for.body.preheader:                               ; preds = %entry
  %1 = zext i32 %i.034 to i64
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.inc.critedge
  %indvars.iv = phi i64 [ %1, %for.body.preheader ], [ %indvars.iv.next, %for.inc.critedge ]
  call void @llvm.lifetime.start.p0(i64 250, ptr nonnull %a) #6
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(250) %a, i8 0, i64 250, i1 false)
  call void @llvm.lifetime.start.p0(i64 250, ptr nonnull %b) #6
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(250) %b, i8 0, i64 250, i1 false)
  %call7 = call ptr @strncpy(ptr noundef nonnull dereferenceable(1) %a, ptr noundef nonnull dereferenceable(1) %s, i64 noundef %indvars.iv)
  %add.ptr = getelementptr inbounds i8, ptr %s, i64 %indvars.iv
  %call11 = call ptr @strncpy(ptr noundef nonnull dereferenceable(1) %b, ptr noundef nonnull dereferenceable(1) %add.ptr, i64 noundef %indvars.iv)
  %call14 = call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %a, ptr noundef nonnull dereferenceable(1) %b)
  %cmp15.not = icmp eq i32 %call14, 0
  br i1 %cmp15.not, label %if.then, label %for.inc.critedge

if.then:                                          ; preds = %for.body
  %2 = trunc i64 %indvars.iv to i32
  %mul = shl nuw nsw i32 %2, 1
  %call17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %mul)
  call void @llvm.lifetime.end.p0(i64 250, ptr nonnull %b) #6
  call void @llvm.lifetime.end.p0(i64 250, ptr nonnull %a) #6
  br label %cleanup19

for.inc.critedge:                                 ; preds = %for.body
  call void @llvm.lifetime.end.p0(i64 250, ptr nonnull %b) #6
  call void @llvm.lifetime.end.p0(i64 250, ptr nonnull %a) #6
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %indvars = trunc i64 %indvars.iv.next to i32
  %cmp = icmp sgt i32 %indvars, 0
  br i1 %cmp, label %for.body, label %cleanup19

cleanup19:                                        ; preds = %for.inc.critedge, %entry, %if.then
  call void @llvm.lifetime.end.p0(i64 250, ptr nonnull %s) #6
  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: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: readwrite)
declare ptr @strncpy(ptr noalias noundef returned writeonly, ptr noalias nocapture noundef readonly, i64 noundef) local_unnamed_addr #5

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #4 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 #5 = { mustprogress nofree nounwind willreturn memory(argmem: readwrite) "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 #6 = { 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)"}
