; LLVM IR from DionysiosB/CodeForces :: 0900-0999 (920A-WaterTheGarden)

; 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 [5 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
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %11

11:                                               ; preds = %69, %0
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %2, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %72

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %16 = 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
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %66, %15
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %69

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %23 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %8)
  %24 = load i64, ptr %7, align 8, !tbaa !5
  %25 = icmp eq i64 %24, 0
  br i1 %25, label %26, label %28

26:                                               ; preds = %22
  %27 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %27, ptr %6, align 8, !tbaa !5
  br label %43

28:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %29 = load i64, ptr %8, align 8, !tbaa !5
  %30 = load i64, ptr %5, align 8, !tbaa !5
  %31 = sub nsw i64 %29, %30
  %32 = sdiv i64 %31, 2
  %33 = add nsw i64 1, %32
  store i64 %33, ptr %9, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = load i64, ptr %9, align 8, !tbaa !5
  %36 = icmp sgt i64 %34, %35
  br i1 %36, label %37, label %39

37:                                               ; preds = %28
  %38 = load i64, ptr %6, align 8, !tbaa !5
  br label %41

39:                                               ; preds = %28
  %40 = load i64, ptr %9, align 8, !tbaa !5
  br label %41

41:                                               ; preds = %39, %37
  %42 = phi i64 [ %38, %37 ], [ %40, %39 ]
  store i64 %42, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %43

43:                                               ; preds = %41, %26
  %44 = load i64, ptr %7, align 8, !tbaa !5
  %45 = add nsw i64 %44, 1
  %46 = load i64, ptr %4, align 8, !tbaa !5
  %47 = icmp eq i64 %45, %46
  br i1 %47, label %48, label %64

48:                                               ; preds = %43
  %49 = load i64, ptr %6, align 8, !tbaa !5
  %50 = load i64, ptr %3, align 8, !tbaa !5
  %51 = load i64, ptr %8, align 8, !tbaa !5
  %52 = sub nsw i64 %50, %51
  %53 = add nsw i64 %52, 1
  %54 = icmp sgt i64 %49, %53
  br i1 %54, label %55, label %57

55:                                               ; preds = %48
  %56 = load i64, ptr %6, align 8, !tbaa !5
  br label %62

57:                                               ; preds = %48
  %58 = load i64, ptr %3, align 8, !tbaa !5
  %59 = load i64, ptr %8, align 8, !tbaa !5
  %60 = sub nsw i64 %58, %59
  %61 = add nsw i64 %60, 1
  br label %62

62:                                               ; preds = %57, %55
  %63 = phi i64 [ %56, %55 ], [ %61, %57 ]
  store i64 %63, ptr %6, align 8, !tbaa !5
  br label %64

64:                                               ; preds = %62, %43
  %65 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %65, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %66

66:                                               ; preds = %64
  %67 = load i64, ptr %7, align 8, !tbaa !5
  %68 = add nsw i64 %67, 1
  store i64 %68, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !9

69:                                               ; preds = %21
  %70 = load i64, ptr %6, align 8, !tbaa !5
  %71 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %70)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  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 %11, !llvm.loop !11

72:                                               ; preds = %11
  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

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}


; 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 [5 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) #4
  %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
  %.not18 = icmp eq i64 %6, 0
  br i1 %.not18, label %._crit_edge21, label %.lr.ph20

.lr.ph20:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = icmp sgt i64 %9, 0
  br i1 %10, label %11, label %._crit_edge

11:                                               ; preds = %.lr.ph20
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = icmp eq i64 %14, 1
  br i1 %15, label %.thread, label %19

.thread:                                          ; preds = %11
  %16 = load i64, ptr %2, align 8, !tbaa !5
  %17 = add i64 %16, 1
  %18 = sub i64 %17, %13
  %.1..peel = call i64 @llvm.smax.i64(i64 %13, i64 %18)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  br label %._crit_edge

19:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  %20 = icmp sgt i64 %14, 1
  br i1 %20, label %.lr.ph.peel.next, label %._crit_edge

._crit_edge:                                      ; preds = %37, %19, %.thread, %.lr.ph20
  %.013.lcssa = phi i64 [ 0, %.lr.ph20 ], [ %13, %19 ], [ %.1..peel, %.thread ], [ %.2, %37 ]
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.013.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = add nsw i64 %22, -1
  store i64 %23, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %22, 0
  br i1 %.not, label %._crit_edge21, label %.lr.ph20, !llvm.loop !9

.lr.ph.peel.next:                                 ; preds = %19, %37
  %.017 = phi i64 [ %25, %37 ], [ %13, %19 ]
  %.01216 = phi i64 [ %30, %37 ], [ 1, %19 ]
  %.01315 = phi i64 [ %.2, %37 ], [ %13, %19 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %24 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = sub nsw i64 %25, %.017
  %27 = sdiv i64 %26, 2
  %28 = add nsw i64 %27, 1
  %29 = call i64 @llvm.smax.i64(i64 %.01315, i64 %28)
  %30 = add nuw nsw i64 %.01216, 1
  %31 = load i64, ptr %3, align 8, !tbaa !5
  %32 = icmp eq i64 %30, %31
  br i1 %32, label %33, label %37

33:                                               ; preds = %.lr.ph.peel.next
  %34 = load i64, ptr %2, align 8, !tbaa !5
  %35 = add i64 %34, 1
  %36 = sub i64 %35, %25
  %.1. = call i64 @llvm.smax.i64(i64 %29, i64 %36)
  br label %37

37:                                               ; preds = %33, %.lr.ph.peel.next
  %.2 = phi i64 [ %.1., %33 ], [ %29, %.lr.ph.peel.next ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  %38 = icmp slt i64 %30, %31
  br i1 %38, label %.lr.ph.peel.next, label %._crit_edge, !llvm.loop !11

._crit_edge21:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #4
  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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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}
!12 = !{!"llvm.loop.peeled.count", i32 1}


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