; LLVM IR from DionysiosB/CodeForces :: 1842B-TenzingAndBooks (main)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i8, align 1
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %12

12:                                               ; preds = %51, %0
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = add nsw i64 %13, -1
  store i64 %14, ptr %2, align 8, !tbaa !5
  %15 = icmp ne i64 %13, 0
  br i1 %15, label %16, label %58

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %48, %16
  %19 = load i64, ptr %6, align 8, !tbaa !5
  %20 = icmp slt i64 %19, 3
  br i1 %20, label %22, label %21

21:                                               ; preds = %18
  store i32 4, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %51

22:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  store i8 1, ptr %8, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store i64 0, ptr %9, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %44, %22
  %24 = load i64, ptr %9, align 8, !tbaa !5
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = icmp slt i64 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  store i32 7, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %47

28:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %29 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %10)
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = load i64, ptr %10, align 8, !tbaa !5
  %32 = or i64 %30, %31
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = icmp ne i64 %32, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %28
  store i8 0, ptr %8, align 1, !tbaa !9
  br label %36

36:                                               ; preds = %35, %28
  %37 = load i8, ptr %8, align 1, !tbaa !9, !range !11, !noundef !12
  %38 = trunc i8 %37 to i1
  br i1 %38, label %39, label %43

39:                                               ; preds = %36
  %40 = load i64, ptr %10, align 8, !tbaa !5
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = or i64 %41, %40
  store i64 %42, ptr %5, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %39, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %44

44:                                               ; preds = %43
  %45 = load i64, ptr %9, align 8, !tbaa !5
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %9, align 8, !tbaa !5
  br label %23, !llvm.loop !13

47:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  br label %48

48:                                               ; preds = %47
  %49 = load i64, ptr %6, align 8, !tbaa !5
  %50 = add nsw i64 %49, 1
  store i64 %50, ptr %6, align 8, !tbaa !5
  br label %18, !llvm.loop !15

51:                                               ; preds = %21
  %52 = load i64, ptr %4, align 8, !tbaa !5
  %53 = load i64, ptr %5, align 8, !tbaa !5
  %54 = icmp eq i64 %52, %53
  %55 = zext i1 %54 to i64
  %56 = select i1 %54, ptr @.str.2, ptr @.str.3
  %57 = call i32 @puts(ptr noundef %56)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %12, !llvm.loop !16

58:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %59 = load i32, ptr %1, align 4
  ret i32 %59
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

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

declare i32 @puts(ptr noundef) #2

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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.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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}
!16 = distinct !{!16, !14}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not20 = icmp eq i64 %6, 0
  br i1 %.not20, label %._crit_edge23, label %.lr.ph22

.lr.ph22:                                         ; preds = %0, %.split19.us
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = icmp sgt i64 %9, 0
  br i1 %10, label %.lr.ph, label %.split19.us

.split19.us:                                      ; preds = %.lr.ph.2, %._crit_edge, %._crit_edge.1, %.lr.ph22
  %.us-phi = phi i64 [ 0, %.lr.ph22 ], [ %.2.1, %._crit_edge.1 ], [ %.2, %._crit_edge ], [ %.2.2, %.lr.ph.2 ]
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = icmp eq i64 %11, %.us-phi
  %13 = select i1 %12, ptr @.str.2, ptr @.str.3
  %14 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %13)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %15 = load i64, ptr %1, align 8, !tbaa !5
  %16 = add nsw i64 %15, -1
  store i64 %16, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %15, 0
  br i1 %.not, label %._crit_edge23, label %.lr.ph22, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %17 = icmp sgt i64 %41, 0
  br i1 %17, label %.lr.ph.1, label %.split19.us

.lr.ph.1:                                         ; preds = %._crit_edge, %.lr.ph.1
  %.015.1 = phi i64 [ %23, %.lr.ph.1 ], [ 0, %._crit_edge ]
  %.0814.1 = phi i1 [ %spec.select.1, %.lr.ph.1 ], [ true, %._crit_edge ]
  %.11113.1 = phi i64 [ %.2.1, %.lr.ph.1 ], [ %.2, %._crit_edge ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = load i64, ptr %4, align 8
  %21 = or i64 %20, %19
  %.not12.1 = icmp eq i64 %21, %19
  %spec.select.1 = select i1 %.not12.1, i1 %.0814.1, i1 false
  %22 = select i1 %spec.select.1, i64 %20, i64 0
  %.2.1 = or i64 %22, %.11113.1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %23 = add nuw nsw i64 %.015.1, 1
  %24 = load i64, ptr %2, align 8, !tbaa !5
  %25 = icmp slt i64 %23, %24
  br i1 %25, label %.lr.ph.1, label %._crit_edge.1, !llvm.loop !11

._crit_edge.1:                                    ; preds = %.lr.ph.1
  %26 = icmp sgt i64 %24, 0
  br i1 %26, label %.lr.ph.2, label %.split19.us

.lr.ph.2:                                         ; preds = %._crit_edge.1, %.lr.ph.2
  %.015.2 = phi i64 [ %32, %.lr.ph.2 ], [ 0, %._crit_edge.1 ]
  %.0814.2 = phi i1 [ %spec.select.2, %.lr.ph.2 ], [ true, %._crit_edge.1 ]
  %.11113.2 = phi i64 [ %.2.2, %.lr.ph.2 ], [ %.2.1, %._crit_edge.1 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %27 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = load i64, ptr %4, align 8
  %30 = or i64 %29, %28
  %.not12.2 = icmp eq i64 %30, %28
  %spec.select.2 = select i1 %.not12.2, i1 %.0814.2, i1 false
  %31 = select i1 %spec.select.2, i64 %29, i64 0
  %.2.2 = or i64 %31, %.11113.2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %32 = add nuw nsw i64 %.015.2, 1
  %33 = load i64, ptr %2, align 8, !tbaa !5
  %34 = icmp slt i64 %32, %33
  br i1 %34, label %.lr.ph.2, label %.split19.us, !llvm.loop !11

.lr.ph:                                           ; preds = %.lr.ph22, %.lr.ph
  %.015 = phi i64 [ %40, %.lr.ph ], [ 0, %.lr.ph22 ]
  %.0814 = phi i1 [ %spec.select, %.lr.ph ], [ true, %.lr.ph22 ]
  %.11113 = phi i64 [ %.2, %.lr.ph ], [ 0, %.lr.ph22 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %35 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %36 = load i64, ptr %3, align 8, !tbaa !5
  %37 = load i64, ptr %4, align 8
  %38 = or i64 %37, %36
  %.not12 = icmp eq i64 %38, %36
  %spec.select = select i1 %.not12, i1 %.0814, i1 false
  %39 = select i1 %spec.select, i64 %37, i64 0
  %.2 = or i64 %39, %.11113
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %40 = add nuw nsw i64 %.015, 1
  %41 = load i64, ptr %2, align 8, !tbaa !5
  %42 = icmp slt i64 %40, %41
  br i1 %42, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge23:                                    ; preds = %.split19.us, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

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 = { 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.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 = !{!"long", !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}


; Effective O3 passes: AggressiveInstCombinePass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass