; LLVM IR from tangjz/acm-icpc :: lydsy (1059)

; 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
@mark = external dso_local global [201 x i32], align 16
@vis = external dso_local global [201 x [201 x i8]], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5checkv() #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 {
  %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
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %8

8:                                                ; preds = %44, %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr %2, align 4, !tbaa !5
  %11 = icmp ne i32 %9, 0
  br i1 %11, label %12, label %49

12:                                               ; preds = %8
  call void @llvm.memset.p0.i64(ptr align 16 @vis, i8 0, i64 40401, i1 false)
  call void @llvm.memset.p0.i64(ptr align 16 @mark, i8 0, i64 804, i1 false)
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 1, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  br label %14

14:                                               ; preds = %41, %12
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = load i32, ptr @n, align 4, !tbaa !5
  %17 = icmp sle i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 4, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %44

19:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %37, %19
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = load i32, ptr @n, align 4, !tbaa !5
  %23 = icmp sle i32 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i32 7, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %40

25:                                               ; preds = %20
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %4)
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = icmp ne i32 %27, 0
  br i1 %28, label %29, label %36

29:                                               ; preds = %25
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [201 x [201 x i8]], ptr @vis, i64 0, i64 %31
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [201 x i8], ptr %32, i64 0, i64 %34
  store i8 1, ptr %35, align 1, !tbaa !9
  br label %36

36:                                               ; preds = %29, %25
  br label %37

37:                                               ; preds = %36
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %6, align 4, !tbaa !5
  br label %20, !llvm.loop !11

40:                                               ; preds = %24
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %3, align 4, !tbaa !5
  br label %14, !llvm.loop !13

44:                                               ; preds = %18
  %45 = call noundef zeroext i1 @_Z5checkv()
  %46 = zext i1 %45 to i64
  %47 = select i1 %45, ptr @.str.1, ptr @.str.2
  %48 = call i32 @puts(ptr noundef %47)
  br label %8, !llvm.loop !14

49:                                               ; preds = %8
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %50 = load i32, ptr %1, align 4
  ret i32 %50
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #4

declare i32 @puts(ptr noundef) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #4 = { "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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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
@mark = external dso_local local_unnamed_addr global [201 x i32], align 16
@vis = external dso_local local_unnamed_addr global [201 x [201 x i8]], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z5checkv() local_unnamed_addr #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: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr %1, align 4, !tbaa !5
  %.not16 = icmp eq i32 %4, 0
  br i1 %.not16, label %._crit_edge19, label %.lr.ph18

.lr.ph18:                                         ; preds = %0, %._crit_edge15
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(40401) @vis, i8 0, i64 40401, i1 false)
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(804) @mark, i8 0, i64 804, i1 false)
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %.not813 = icmp slt i32 %7, 1
  br i1 %.not813, label %._crit_edge15, label %.preheader

.preheader:                                       ; preds = %.lr.ph18, %._crit_edge
  %8 = phi i32 [ %14, %._crit_edge ], [ %7, %.lr.ph18 ]
  %indvars.iv22 = phi i64 [ %indvars.iv.next23, %._crit_edge ], [ 1, %.lr.ph18 ]
  %.not911 = icmp slt i32 %8, 1
  br i1 %.not911, label %.preheader.._crit_edge_crit_edge, label %.lr.ph

.preheader.._crit_edge_crit_edge:                 ; preds = %.preheader
  %.pre = sext i32 %8 to i64
  br label %._crit_edge

._crit_edge15:                                    ; preds = %._crit_edge, %.lr.ph18
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %9 = call noundef zeroext i1 @_Z5checkv()
  %10 = select i1 %9, ptr @.str.1, ptr @.str.2
  %11 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %10)
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %._crit_edge19, label %.lr.ph18, !llvm.loop !9

._crit_edge:                                      ; preds = %19, %.preheader.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre, %.preheader.._crit_edge_crit_edge ], [ %21, %19 ]
  %14 = phi i32 [ %8, %.preheader.._crit_edge_crit_edge ], [ %20, %19 ]
  %indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
  %.not8.not = icmp slt i64 %indvars.iv22, %.pre-phi
  br i1 %.not8.not, label %.preheader, label %._crit_edge15, !llvm.loop !11

.lr.ph:                                           ; preds = %.preheader, %19
  %indvars.iv = phi i64 [ %indvars.iv.next, %19 ], [ 1, %.preheader ]
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %.not10 = icmp eq i32 %16, 0
  br i1 %.not10, label %19, label %17

17:                                               ; preds = %.lr.ph
  %18 = getelementptr inbounds [201 x [201 x i8]], ptr @vis, i64 0, i64 %indvars.iv22, i64 %indvars.iv
  store i8 1, ptr %18, align 1, !tbaa !13
  br label %19

19:                                               ; preds = %.lr.ph, %17
  %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
  %.not9.not = icmp slt i64 %indvars.iv, %21
  br i1 %.not9.not, label %.lr.ph, label %._crit_edge, !llvm.loop !15

._crit_edge19:                                    ; preds = %._crit_edge15, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #4

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #4 = { 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 #5 = { 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}
!12 = !{!"llvm.loop.unswitch.partial.disable"}
!13 = !{!14, !14, i64 0}
!14 = !{!"bool", !7, i64 0}
!15 = distinct !{!15, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass