; LLVM IR from DionysiosB/CodeForces :: 1834A-UnitArray (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 [3 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 i32, align 4
  %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 = %59, %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 %62

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
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %33, %14
  %17 = load i64, ptr %6, 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 %6) #3
  br label %36

21:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %7)
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = icmp sgt i32 %23, 0
  %25 = zext i1 %24 to i64
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = add nsw i64 %26, %25
  store i64 %27, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = icmp slt i32 %28, 0
  %30 = zext i1 %29 to i64
  %31 = load i64, ptr %5, align 8, !tbaa !5
  %32 = add nsw i64 %31, %30
  store i64 %32, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %33

33:                                               ; preds = %21
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = add nsw i64 %34, 1
  store i64 %35, ptr %6, align 8, !tbaa !5
  br label %16, !llvm.loop !11

36:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !5
  %37 = load i64, ptr %4, align 8, !tbaa !5
  %38 = load i64, ptr %5, align 8, !tbaa !5
  %39 = icmp slt i64 %37, %38
  br i1 %39, label %40, label %52

40:                                               ; preds = %36
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = load i64, ptr %4, align 8, !tbaa !5
  %43 = sub nsw i64 %41, %42
  %44 = add nsw i64 %43, 1
  %45 = sdiv i64 %44, 2
  store i64 %45, ptr %8, align 8, !tbaa !5
  %46 = load i64, ptr %8, align 8, !tbaa !5
  %47 = load i64, ptr %4, align 8, !tbaa !5
  %48 = add nsw i64 %47, %46
  store i64 %48, ptr %4, align 8, !tbaa !5
  %49 = load i64, ptr %8, align 8, !tbaa !5
  %50 = load i64, ptr %5, align 8, !tbaa !5
  %51 = sub nsw i64 %50, %49
  store i64 %51, ptr %5, align 8, !tbaa !5
  br label %52

52:                                               ; preds = %40, %36
  %53 = load i64, ptr %5, align 8, !tbaa !5
  %54 = srem i64 %53, 2
  %55 = icmp ne i64 %54, 0
  br i1 %55, label %56, label %59

56:                                               ; preds = %52
  %57 = load i64, ptr %8, align 8, !tbaa !5
  %58 = add nsw i64 %57, 1
  store i64 %58, ptr %8, align 8, !tbaa !5
  br label %59

59:                                               ; preds = %56, %52
  %60 = load i64, ptr %8, align 8, !tbaa !5
  %61 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %60)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #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 %10, !llvm.loop !13

62:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %63 = load i32, ptr %1, align 4
  ret i32 %63
}

; 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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 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 i32, align 4
  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
  %.not25 = icmp eq i64 %5, 0
  br i1 %.not25, label %._crit_edge28, label %.lr.ph27

.lr.ph27:                                         ; preds = %0, %._crit_edge.thread
  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.thread

._crit_edge:                                      ; preds = %.lr.ph
  %10 = icmp ult i64 %15, %17
  br i1 %10, label %21, label %._crit_edge.thread

.lr.ph:                                           ; preds = %.lr.ph27, %.lr.ph
  %.01623 = phi i64 [ %18, %.lr.ph ], [ 0, %.lr.ph27 ]
  %.01722 = phi i64 [ %17, %.lr.ph ], [ 0, %.lr.ph27 ]
  %.01921 = phi i64 [ %15, %.lr.ph ], [ 0, %.lr.ph27 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3)
  %12 = load i32, ptr %3, align 4, !tbaa !9
  %13 = icmp sgt i32 %12, 0
  %14 = zext i1 %13 to i64
  %15 = add nuw nsw i64 %.01921, %14
  %.lobit = lshr i32 %12, 31
  %16 = zext nneg i32 %.lobit to i64
  %17 = add nuw nsw i64 %.01722, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  %18 = add nuw nsw i64 %.01623, 1
  %19 = load i64, ptr %2, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !11

21:                                               ; preds = %._crit_edge
  %reass.sub = sub nsw i64 %17, %15
  %22 = add i64 %reass.sub, 1
  %23 = sdiv i64 %22, 2
  %24 = sub nsw i64 %17, %23
  br label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %.lr.ph27, %21, %._crit_edge
  %.118 = phi i64 [ %24, %21 ], [ %17, %._crit_edge ], [ 0, %.lr.ph27 ]
  %.0 = phi i64 [ %23, %21 ], [ 0, %._crit_edge ], [ 0, %.lr.ph27 ]
  %25 = and i64 %.118, 1
  %spec.select = add nsw i64 %.0, %25
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %spec.select)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %27 = load i64, ptr %1, align 8, !tbaa !5
  %28 = add nsw i64 %27, -1
  store i64 %28, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %27, 0
  br i1 %.not, label %._crit_edge28, label %.lr.ph27, !llvm.loop !13

._crit_edge28:                                    ; preds = %._crit_edge.thread, %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

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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