; LLVM IR from DionysiosB/CodeForces :: 1400-1499 (1493A-AntiKnapsack)

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

8:                                                ; preds = %48, %0
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = add nsw i64 %9, -1
  store i64 %10, ptr %2, align 8, !tbaa !5
  %11 = icmp ne i64 %9, 0
  br i1 %11, label %12, label %50

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4)
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = add nsw i64 %15, 1
  %17 = sdiv i64 %16, 2
  %18 = sub nsw i64 %14, %17
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %18)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = add nsw i64 %20, 1
  %22 = sdiv i64 %21, 2
  store i64 %22, ptr %5, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %31, %12
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = icmp slt i64 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %34

28:                                               ; preds = %23
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %29)
  br label %31

31:                                               ; preds = %28
  %32 = load i64, ptr %5, align 8, !tbaa !5
  %33 = add nsw i64 %32, 1
  store i64 %33, ptr %5, align 8, !tbaa !5
  br label %23, !llvm.loop !9

34:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = add nsw i64 %35, 1
  store i64 %36, ptr %6, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %45, %34
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = icmp sle i64 %38, %39
  br i1 %40, label %42, label %41

41:                                               ; preds = %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %48

42:                                               ; preds = %37
  %43 = load i64, ptr %6, align 8, !tbaa !5
  %44 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %43)
  br label %45

45:                                               ; preds = %42
  %46 = load i64, ptr %6, align 8, !tbaa !5
  %47 = add nsw i64 %46, 1
  store i64 %47, ptr %6, align 8, !tbaa !5
  br label %37, !llvm.loop !11

48:                                               ; preds = %41
  %49 = 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 %8, !llvm.loop !12

50:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %51 = load i32, ptr %1, align 4
  ret i32 %51
}

; 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

declare i32 @printf(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 = 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"

@.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
@.str.3 = external hidden unnamed_addr constant [5 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
  %.not14 = icmp eq i64 %5, 0
  br i1 %.not14, label %._crit_edge17, label %.lr.ph16

.lr.ph16:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = add nsw i64 %9, 1
  %.neg = sdiv i64 %10, -2
  %11 = add i64 %.neg, %8
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %11)
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = add nsw i64 %13, 1
  %15 = sdiv i64 %14, 2
  %16 = icmp slt i64 %15, %13
  br i1 %16, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %.lr.ph16
  %.lcssa = phi i64 [ %13, %.lr.ph16 ], [ %20, %.lr.ph ]
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %.not9.not11 = icmp slt i64 %.lcssa, %17
  br i1 %.not9.not11, label %.lr.ph13, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph16, %.lr.ph
  %.0710 = phi i64 [ %19, %.lr.ph ], [ %15, %.lr.ph16 ]
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %.0710)
  %19 = add nsw i64 %.0710, 1
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = icmp slt i64 %19, %20
  br i1 %21, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph13, %.preheader
  %22 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %23 = load i64, ptr %1, align 8, !tbaa !5
  %24 = add nsw i64 %23, -1
  store i64 %24, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %23, 0
  br i1 %.not, label %._crit_edge17, label %.lr.ph16, !llvm.loop !11

.lr.ph13:                                         ; preds = %.preheader, %.lr.ph13
  %.0.in12 = phi i64 [ %.0, %.lr.ph13 ], [ %.lcssa, %.preheader ]
  %.0 = add nsw i64 %.0.in12, 1
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %.0)
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %.not9.not = icmp slt i64 %.0, %26
  br i1 %.not9.not, label %.lr.ph13, label %._crit_edge, !llvm.loop !12

._crit_edge17:                                    ; preds = %._crit_edge, %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: nofree nounwind
declare noundef i32 @printf(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}
!12 = distinct !{!12, !10}


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