; LLVM IR from DionysiosB/CodeForces :: 1400-1499 (1407A-Ahahahahahahahaha)

; 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 [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [1 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 i64, align 8
  %8 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %10

10:                                               ; preds = %68, %0
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = add nsw i64 %11, -1
  store i64 %12, ptr %2, align 8, !tbaa !5
  %13 = icmp ne i64 %11, 0
  br i1 %13, label %14, label %70

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %26, %14
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp slt i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %29

21:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  %23 = load i64, ptr %6, align 8, !tbaa !5
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = add nsw i64 %24, %23
  store i64 %25, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %26

26:                                               ; preds = %21
  %27 = load i64, ptr %5, align 8, !tbaa !5
  %28 = add nsw i64 %27, 1
  store i64 %28, ptr %5, align 8, !tbaa !5
  br label %16, !llvm.loop !9

29:                                               ; preds = %20
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = load i64, ptr %3, align 8, !tbaa !5
  %32 = sdiv i64 %31, 2
  %33 = icmp sle i64 %30, %32
  br i1 %33, label %34, label %50

34:                                               ; preds = %29
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = sdiv i64 %35, 2
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %36)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %46, %34
  %39 = load i64, ptr %7, align 8, !tbaa !5
  %40 = load i64, ptr %3, align 8, !tbaa !5
  %41 = sdiv i64 %40, 2
  %42 = icmp slt i64 %39, %41
  br i1 %42, label %44, label %43

43:                                               ; preds = %38
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %49

44:                                               ; preds = %38
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %46

46:                                               ; preds = %44
  %47 = load i64, ptr %7, align 8, !tbaa !5
  %48 = add nsw i64 %47, 1
  store i64 %48, ptr %7, align 8, !tbaa !5
  br label %38, !llvm.loop !11

49:                                               ; preds = %43
  br label %68

50:                                               ; preds = %29
  %51 = load i64, ptr %4, align 8, !tbaa !5
  %52 = srem i64 %51, 2
  %53 = load i64, ptr %4, align 8, !tbaa !5
  %54 = sub nsw i64 %53, %52
  store i64 %54, ptr %4, align 8, !tbaa !5
  %55 = load i64, ptr %4, align 8, !tbaa !5
  %56 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %55)
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %57

57:                                               ; preds = %64, %50
  %58 = load i64, ptr %8, align 8, !tbaa !5
  %59 = load i64, ptr %4, align 8, !tbaa !5
  %60 = icmp slt i64 %58, %59
  br i1 %60, label %62, label %61

61:                                               ; preds = %57
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %67

62:                                               ; preds = %57
  %63 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %64

64:                                               ; preds = %62
  %65 = load i64, ptr %8, align 8, !tbaa !5
  %66 = add nsw i64 %65, 1
  store i64 %66, ptr %8, align 8, !tbaa !5
  br label %57, !llvm.loop !12

67:                                               ; preds = %61
  br label %68

68:                                               ; preds = %67, %49
  %69 = call i32 @puts(ptr noundef @.str.4)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %10, !llvm.loop !13

70:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  ret i32 0
}

; 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 @printf(ptr noundef, ...) #2

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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [1 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not28 = icmp eq i64 %5, 0
  br i1 %.not28, label %._crit_edge31, label %.lr.ph30

.lr.ph30:                                         ; preds = %0, %.loopexit
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph30
  %.014.lcssa = phi i64 [ 0, %.lr.ph30 ], [ %13, %.lr.ph ]
  %.lcssa = phi i64 [ %8, %.lr.ph30 ], [ %15, %.lr.ph ]
  %10 = sdiv i64 %.lcssa, 2
  %.not17 = icmp sgt i64 %.014.lcssa, %10
  br i1 %.not17, label %26, label %17

.lr.ph:                                           ; preds = %.lr.ph30, %.lr.ph
  %.01320 = phi i64 [ %14, %.lr.ph ], [ 0, %.lr.ph30 ]
  %.01419 = phi i64 [ %13, %.lr.ph ], [ 0, %.lr.ph30 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = add nsw i64 %12, %.01419
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  %14 = add nuw nsw i64 %.01320, 1
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = icmp slt i64 %14, %15
  br i1 %16, label %.lr.ph, label %._crit_edge, !llvm.loop !9

17:                                               ; preds = %._crit_edge
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %10)
  %19 = load i64, ptr %2, align 8, !tbaa !5
  %20 = icmp sgt i64 %19, 1
  br i1 %20, label %.lr.ph24, label %.loopexit

.lr.ph24:                                         ; preds = %17, %.lr.ph24
  %.01222 = phi i64 [ %22, %.lr.ph24 ], [ 0, %17 ]
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %22 = add nuw nsw i64 %.01222, 1
  %23 = load i64, ptr %2, align 8, !tbaa !5
  %24 = sdiv i64 %23, 2
  %25 = icmp slt i64 %22, %24
  br i1 %25, label %.lr.ph24, label %.loopexit, !llvm.loop !11

26:                                               ; preds = %._crit_edge
  %27 = srem i64 %.014.lcssa, 2
  %28 = sub nsw i64 %.014.lcssa, %27
  %29 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %28)
  %30 = icmp sgt i64 %28, 0
  br i1 %30, label %.lr.ph27, label %.loopexit

.lr.ph27:                                         ; preds = %26, %.lr.ph27
  %.025 = phi i64 [ %32, %.lr.ph27 ], [ 0, %26 ]
  %31 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %32 = add nuw nsw i64 %.025, 1
  %exitcond.not = icmp eq i64 %32, %28
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph27, !llvm.loop !12

.loopexit:                                        ; preds = %.lr.ph24, %.lr.ph27, %17, %26
  %33 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %34 = load i64, ptr %1, align 8, !tbaa !5
  %35 = add nsw i64 %34, -1
  store i64 %35, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %34, 0
  br i1 %.not, label %._crit_edge31, label %.lr.ph30, !llvm.loop !13

._crit_edge31:                                    ; preds = %.loopexit, %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 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; 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}
!12 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass