program atcoder
    implicit none
    integer :: i,n,ans
    integer,allocatable,dimension(:) :: a
    read*,n
    allocate(a(n))
    ans = 0
    read(*,*)(a(i),i=1,n)
    do i=1,n
        if(a(a(i))==i)then
            ans = ans + 1
        endif
    enddo
    write(*,'(I0)')ans/2
    stop 
contains
end program atcoder
; ModuleID = 'FIRModule'
source_filename = "FIRModule"
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"

@_QFEa.0 = internal unnamed_addr global ptr null
@_QQcl.672d2d5f89e26194a0e24a9de3e352ac = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_7867/source.f\00"
@_QQcl.28493029 = linkonce constant [4 x i8] c"(I0)"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: noreturn
define void @_QQmain() local_unnamed_addr #1 {
  %1 = alloca i32, align 4
  %2 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.672d2d5f89e26194a0e24a9de3e352ac, i32 5)
  %3 = call i1 @_FortranAioInputInteger(ptr %2, ptr nonnull %1, i32 4)
  %4 = call i32 @_FortranAioEndIoStatement(ptr %2)
  %5 = load i32, ptr %1, align 4, !tbaa !3
  %6 = call i32 @llvm.smax.i32(i32 %5, i32 0)
  %7 = zext i32 %6 to i64
  %8 = shl nuw nsw i64 %7, 2
  %9 = call ptr @malloc(i64 %8)
  store ptr %9, ptr @_QFEa.0, align 8, !tbaa !7
  %10 = call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.672d2d5f89e26194a0e24a9de3e352ac, i32 8)
  %11 = load i32, ptr %1, align 4, !tbaa !3
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %0
  %13 = zext i32 %11 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %14 = phi i64 [ %19, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %.unpack74 = load ptr, ptr @_QFEa.0, align 8, !tbaa !7
  %sext = shl i64 %14, 32
  %15 = ashr exact i64 %sext, 32
  %16 = add nsw i64 %15, -1
  %17 = getelementptr i32, ptr %.unpack74, i64 %16
  %18 = call i1 @_FortranAioInputInteger(ptr %10, ptr %17, i32 4)
  %19 = add nuw nsw i64 %14, 1
  %exitcond.not = icmp eq i64 %14, %13
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %20 = call i32 @_FortranAioEndIoStatement(ptr %10)
  %21 = load i32, ptr %1, align 4, !tbaa !3
  %22 = icmp sgt i32 %21, 0
  br i1 %22, label %.lr.ph88, label %._crit_edge89

.lr.ph88:                                         ; preds = %._crit_edge
  %23 = zext i32 %21 to i64
  %.unpack = load ptr, ptr @_QFEa.0, align 8, !tbaa !7
  %xtraiter = and i64 %23, 1
  %24 = icmp eq i32 %21, 1
  br i1 %24, label %._crit_edge89.loopexit.unr-lcssa, label %.lr.ph88.new

.lr.ph88.new:                                     ; preds = %.lr.ph88
  %unroll_iter = and i64 %23, 4294967294
  br label %25

25:                                               ; preds = %25, %.lr.ph88.new
  %indvars.iv = phi i64 [ 1, %.lr.ph88.new ], [ %indvars.iv.next.1, %25 ]
  %.086 = phi i32 [ 0, %.lr.ph88.new ], [ %spec.select.1, %25 ]
  %niter = phi i64 [ 0, %.lr.ph88.new ], [ %niter.next.1, %25 ]
  %26 = add nsw i64 %indvars.iv, -1
  %27 = getelementptr i32, ptr %.unpack, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !3
  %29 = sext i32 %28 to i64
  %30 = add nsw i64 %29, -1
  %31 = getelementptr i32, ptr %.unpack, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !3
  %33 = zext i32 %32 to i64
  %34 = icmp eq i64 %indvars.iv, %33
  %35 = zext i1 %34 to i32
  %spec.select = add i32 %.086, %35
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %36 = getelementptr i32, ptr %.unpack, i64 %indvars.iv
  %37 = load i32, ptr %36, align 4, !tbaa !3
  %38 = sext i32 %37 to i64
  %39 = add nsw i64 %38, -1
  %40 = getelementptr i32, ptr %.unpack, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !3
  %42 = zext i32 %41 to i64
  %43 = icmp eq i64 %indvars.iv.next, %42
  %44 = zext i1 %43 to i32
  %spec.select.1 = add i32 %spec.select, %44
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge89.loopexit.unr-lcssa, label %25

._crit_edge89.loopexit.unr-lcssa:                 ; preds = %25, %.lr.ph88
  %spec.select.lcssa.ph = phi i32 [ undef, %.lr.ph88 ], [ %spec.select.1, %25 ]
  %indvars.iv.unr = phi i64 [ 1, %.lr.ph88 ], [ %indvars.iv.next.1, %25 ]
  %.086.unr = phi i32 [ 0, %.lr.ph88 ], [ %spec.select.1, %25 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge89.loopexit, label %._crit_edge89.loopexit.epilog-lcssa

._crit_edge89.loopexit.epilog-lcssa:              ; preds = %._crit_edge89.loopexit.unr-lcssa
  %45 = add nsw i64 %indvars.iv.unr, -1
  %46 = getelementptr i32, ptr %.unpack, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !3
  %48 = sext i32 %47 to i64
  %49 = add nsw i64 %48, -1
  %50 = getelementptr i32, ptr %.unpack, i64 %49
  %51 = load i32, ptr %50, align 4, !tbaa !3
  %52 = zext i32 %51 to i64
  %53 = icmp eq i64 %indvars.iv.unr, %52
  %54 = zext i1 %53 to i32
  %spec.select.epil = add i32 %.086.unr, %54
  br label %._crit_edge89.loopexit

._crit_edge89.loopexit:                           ; preds = %._crit_edge89.loopexit.unr-lcssa, %._crit_edge89.loopexit.epilog-lcssa
  %spec.select.lcssa = phi i32 [ %spec.select.lcssa.ph, %._crit_edge89.loopexit.unr-lcssa ], [ %spec.select.epil, %._crit_edge89.loopexit.epilog-lcssa ]
  %55 = sdiv i32 %spec.select.lcssa, 2
  br label %._crit_edge89

._crit_edge89:                                    ; preds = %._crit_edge89.loopexit, %._crit_edge
  %.0.lcssa = phi i32 [ 0, %._crit_edge ], [ %55, %._crit_edge89.loopexit ]
  %56 = call ptr @_FortranAioBeginExternalFormattedOutput(ptr nonnull @_QQcl.28493029, i64 4, ptr null, i32 -1, ptr nonnull @_QQcl.672d2d5f89e26194a0e24a9de3e352ac, i32 14)
  %57 = call i1 @_FortranAioOutputInteger32(ptr %56, i32 %.0.lcssa)
  %58 = call i32 @_FortranAioEndIoStatement(ptr %56)
  %59 = call {} @_FortranAStopStatement(i32 0, i1 false, i1 false)
  unreachable
}

declare ptr @_FortranAioBeginExternalListInput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioInputInteger(ptr, ptr, i32) local_unnamed_addr

declare i32 @_FortranAioEndIoStatement(ptr) local_unnamed_addr

declare ptr @_FortranAioBeginExternalFormattedOutput(ptr, i64, ptr, i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger32(ptr, i32) local_unnamed_addr

declare {} @_FortranAStopStatement(i32, i1, i1) local_unnamed_addr

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #2

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" }
attributes #1 = { noreturn }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!llvm.module.flags = !{!0, !1, !2}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{!4, !4, i64 0}
!4 = !{!"any data access", !5, i64 0}
!5 = !{!"any access", !6, i64 0}
!6 = !{!"Flang Type TBAA Root"}
!7 = !{!8, !8, i64 0}
!8 = !{!"descriptor member", !5, i64 0}
