; LLVM IR from tangjz/acm-icpc :: codeforces/complete (315A)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@n = external dso_local global i32, align 4
@a = external dso_local global [101 x i32], align 16
@b = external dso_local global [101 x i32], align 16
@ans = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %20, %0
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %23

12:                                               ; preds = %7
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds i32, ptr @a, i64 %14
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr @b, i64 %17
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %15, ptr noundef %18)
  br label %20

20:                                               ; preds = %12
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !9

23:                                               ; preds = %11
  %24 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %24, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %59, %23
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = load i32, ptr @n, align 4, !tbaa !5
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %30, label %29

29:                                               ; preds = %25
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %62

30:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %54, %30
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = load i32, ptr @n, align 4, !tbaa !5
  %34 = icmp slt i32 %32, %33
  br i1 %34, label %36, label %35

35:                                               ; preds = %31
  store i32 8, ptr %4, align 4
  br label %57

36:                                               ; preds = %31
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = icmp ne i32 %37, %38
  br i1 %39, label %40, label %53

40:                                               ; preds = %36
  %41 = load i32, ptr %3, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [101 x i32], ptr @a, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = load i32, ptr %5, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [101 x i32], ptr @b, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = icmp eq i32 %44, %48
  br i1 %49, label %50, label %53

50:                                               ; preds = %40
  %51 = load i32, ptr @ans, align 4, !tbaa !5
  %52 = add nsw i32 %51, -1
  store i32 %52, ptr @ans, align 4, !tbaa !5
  store i32 8, ptr %4, align 4
  br label %57

53:                                               ; preds = %40, %36
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %5, align 4, !tbaa !5
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %5, align 4, !tbaa !5
  br label %31, !llvm.loop !11

57:                                               ; preds = %50, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %58

58:                                               ; preds = %57
  br label %59

59:                                               ; preds = %58
  %60 = load i32, ptr %3, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %3, align 4, !tbaa !5
  br label %25, !llvm.loop !12

62:                                               ; preds = %29
  %63 = load i32, ptr @ans, align 4, !tbaa !5
  %64 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %63)
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

declare i32 @printf(ptr noundef, ...) #1

attributes #0 = { mustprogress norecurse 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 = { "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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind }

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@n = external dso_local global i32, align 4
@a = external dso_local global [101 x i32], align 16
@b = external dso_local global [101 x i32], align 16
@ans = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %0
  store i32 %2, ptr @ans, align 4, !tbaa !5
  br label %._crit_edge20

._crit_edge:                                      ; preds = %.lr.ph
  store i32 %20, ptr @ans, align 4, !tbaa !5
  %4 = icmp sgt i32 %20, 0
  br i1 %4, label %.preheader.us.preheader, label %._crit_edge20

.preheader.us.preheader:                          ; preds = %._crit_edge
  %wide.trip.count29 = zext nneg i32 %20 to i64
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %..loopexit_crit_edge.us
  %indvars.iv26 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next27, %..loopexit_crit_edge.us ]
  %5 = phi i32 [ %20, %.preheader.us.preheader ], [ %15, %..loopexit_crit_edge.us ]
  %6 = getelementptr inbounds [101 x i32], ptr @a, i64 0, i64 %indvars.iv26
  br label %7

7:                                                ; preds = %.preheader.us, %16
  %indvars.iv23 = phi i64 [ 0, %.preheader.us ], [ %indvars.iv.next24, %16 ]
  %.not.us = icmp eq i64 %indvars.iv26, %indvars.iv23
  br i1 %.not.us, label %16, label %8

8:                                                ; preds = %7
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = getelementptr inbounds [101 x i32], ptr @b, i64 0, i64 %indvars.iv23
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp eq i32 %9, %11
  br i1 %12, label %13, label %16

13:                                               ; preds = %8
  %14 = add nsw i32 %5, -1
  store i32 %14, ptr @ans, align 4, !tbaa !5
  br label %..loopexit_crit_edge.us

..loopexit_crit_edge.us:                          ; preds = %16, %13
  %15 = phi i32 [ %14, %13 ], [ %5, %16 ]
  %indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
  %exitcond30.not = icmp eq i64 %indvars.iv.next27, %wide.trip.count29
  br i1 %exitcond30.not, label %._crit_edge20, label %.preheader.us, !llvm.loop !9

16:                                               ; preds = %8, %7
  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next24, %wide.trip.count29
  br i1 %exitcond.not, label %..loopexit_crit_edge.us, label %7, !llvm.loop !11

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %17 = getelementptr inbounds i32, ptr @a, i64 %indvars.iv
  %18 = getelementptr inbounds i32, ptr @b, i64 %indvars.iv
  %19 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %17, ptr noundef nonnull %18)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %20 = load i32, ptr @n, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = icmp slt i64 %indvars.iv.next, %21
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !12

._crit_edge20:                                    ; preds = %..loopexit_crit_edge.us, %._crit_edge.thread, %._crit_edge
  %23 = phi i32 [ %20, %._crit_edge ], [ %2, %._crit_edge.thread ], [ %15, %..loopexit_crit_edge.us ]
  %24 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %23)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { mustprogress nofree norecurse 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 = { 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" }

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass