; LLVM IR from DionysiosB/CodeForces :: 1762A-DivideAndConquer (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 [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 = %82, %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 %85

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %16 = 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 1000, 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 %17

17:                                               ; preds = %72, %15
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = load i64, ptr %3, 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 %6) #3
  br label %75

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %23 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %24 = load i64, ptr %7, align 8, !tbaa !5
  %25 = srem i64 %24, 2
  %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 i64, ptr %7, align 8, !tbaa !5
  %29 = srem i64 %28, 2
  %30 = icmp ne i64 %29, 0
  br i1 %30, label %31, label %51

31:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %36, %31
  %33 = load i64, ptr %7, align 8, !tbaa !5
  %34 = srem i64 %33, 2
  %35 = icmp ne i64 %34, 0
  br i1 %35, label %36, label %41

36:                                               ; preds = %32
  %37 = load i64, ptr %7, align 8, !tbaa !5
  %38 = sdiv i64 %37, 2
  store i64 %38, ptr %7, align 8, !tbaa !5
  %39 = load i64, ptr %8, align 8, !tbaa !5
  %40 = add nsw i64 %39, 1
  store i64 %40, ptr %8, align 8, !tbaa !5
  br label %32, !llvm.loop !9

41:                                               ; preds = %32
  %42 = load i64, ptr %5, align 8, !tbaa !5
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = icmp slt i64 %42, %43
  br i1 %44, label %45, label %47

45:                                               ; preds = %41
  %46 = load i64, ptr %5, align 8, !tbaa !5
  br label %49

47:                                               ; preds = %41
  %48 = load i64, ptr %8, align 8, !tbaa !5
  br label %49

49:                                               ; preds = %47, %45
  %50 = phi i64 [ %46, %45 ], [ %48, %47 ]
  store i64 %50, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %71

51:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store i64 0, ptr %9, align 8, !tbaa !5
  br label %52

52:                                               ; preds = %56, %51
  %53 = load i64, ptr %7, align 8, !tbaa !5
  %54 = srem i64 %53, 2
  %55 = icmp eq i64 %54, 0
  br i1 %55, label %56, label %61

56:                                               ; preds = %52
  %57 = load i64, ptr %7, align 8, !tbaa !5
  %58 = sdiv i64 %57, 2
  store i64 %58, ptr %7, align 8, !tbaa !5
  %59 = load i64, ptr %9, align 8, !tbaa !5
  %60 = add nsw i64 %59, 1
  store i64 %60, ptr %9, align 8, !tbaa !5
  br label %52, !llvm.loop !11

61:                                               ; preds = %52
  %62 = load i64, ptr %5, align 8, !tbaa !5
  %63 = load i64, ptr %9, align 8, !tbaa !5
  %64 = icmp slt i64 %62, %63
  br i1 %64, label %65, label %67

65:                                               ; preds = %61
  %66 = load i64, ptr %5, align 8, !tbaa !5
  br label %69

67:                                               ; preds = %61
  %68 = load i64, ptr %9, align 8, !tbaa !5
  br label %69

69:                                               ; preds = %67, %65
  %70 = phi i64 [ %66, %65 ], [ %68, %67 ]
  store i64 %70, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %71

71:                                               ; preds = %69, %49
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %72

72:                                               ; preds = %71
  %73 = load i64, ptr %6, align 8, !tbaa !5
  %74 = add nsw i64 %73, 1
  store i64 %74, ptr %6, align 8, !tbaa !5
  br label %17, !llvm.loop !12

75:                                               ; preds = %21
  %76 = load i64, ptr %4, align 8, !tbaa !5
  %77 = srem i64 %76, 2
  %78 = icmp ne i64 %77, 0
  br i1 %78, label %79, label %81

79:                                               ; preds = %75
  %80 = load i64, ptr %5, align 8, !tbaa !5
  br label %82

81:                                               ; preds = %75
  br label %82

82:                                               ; preds = %81, %79
  %83 = phi i64 [ %80, %79 ], [ 0, %81 ]
  %84 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %83)
  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 !13

85:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %86 = load i32, ptr %1, align 4
  ret i32 %86
}

; 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}
!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

; 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) #4
  %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
  %.not40 = icmp eq i64 %5, 0
  br i1 %.not40, label %._crit_edge43, label %.lr.ph42

.lr.ph42:                                         ; preds = %0, %._crit_edge37
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %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.ph36, label %._crit_edge37

._crit_edge37:                                    ; preds = %._crit_edge, %.lr.ph42
  %.019.lcssa = phi i64 [ 0, %.lr.ph42 ], [ %18, %._crit_edge ]
  %.018.lcssa = phi i64 [ 1000, %.lr.ph42 ], [ %30, %._crit_edge ]
  %10 = and i64 %.019.lcssa, 1
  %.not20 = icmp eq i64 %10, 0
  %11 = select i1 %.not20, i64 0, i64 %.018.lcssa
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %11)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %13 = load i64, ptr %1, align 8, !tbaa !5
  %14 = add nsw i64 %13, -1
  store i64 %14, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %13, 0
  br i1 %.not, label %._crit_edge43, label %.lr.ph42, !llvm.loop !9

.lr.ph36:                                         ; preds = %.lr.ph42, %._crit_edge
  %.01734 = phi i64 [ %31, %._crit_edge ], [ 0, %.lr.ph42 ]
  %.01833 = phi i64 [ %30, %._crit_edge ], [ 1000, %.lr.ph42 ]
  %.01932 = phi i64 [ %18, %._crit_edge ], [ 0, %.lr.ph42 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = srem i64 %16, 2
  %18 = add nsw i64 %17, %.01932
  %.not21 = icmp eq i64 %17, 0
  %19 = and i64 %16, 1
  %20 = icmp eq i64 %19, 0
  br i1 %.not21, label %.preheader, label %.preheader23

.preheader23:                                     ; preds = %.lr.ph36
  br i1 %20, label %._crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph36
  br i1 %20, label %.lr.ph28, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader23, %.lr.ph
  %.01625 = phi i64 [ %23, %.lr.ph ], [ 0, %.preheader23 ]
  %21 = phi i64 [ %22, %.lr.ph ], [ %16, %.preheader23 ]
  %22 = sdiv i64 %21, 2
  %23 = add nuw nsw i64 %.01625, 1
  %24 = and i64 %22, 1
  %.not22 = icmp eq i64 %24, 0
  br i1 %.not22, label %._crit_edge, label %.lr.ph, !llvm.loop !11

.lr.ph28:                                         ; preds = %.preheader, %.lr.ph28
  %.027 = phi i64 [ %27, %.lr.ph28 ], [ 0, %.preheader ]
  %25 = phi i64 [ %26, %.lr.ph28 ], [ %16, %.preheader ]
  %26 = ashr exact i64 %25, 1
  %27 = add nuw nsw i64 %.027, 1
  %28 = and i64 %25, 2
  %29 = icmp eq i64 %28, 0
  br i1 %29, label %.lr.ph28, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph28, %.preheader, %.preheader23
  %.0.lcssa.sink = phi i64 [ 0, %.preheader23 ], [ 0, %.preheader ], [ %27, %.lr.ph28 ], [ %23, %.lr.ph ]
  %30 = call i64 @llvm.smin.i64(i64 %.01833, i64 %.0.lcssa.sink)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %31 = add nuw nsw i64 %.01734, 1
  %32 = load i64, ptr %2, align 8, !tbaa !5
  %33 = icmp slt i64 %31, %32
  br i1 %33, label %.lr.ph36, label %._crit_edge37, !llvm.loop !13

._crit_edge43:                                    ; preds = %._crit_edge37, %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.smin.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 = distinct !{!12, !10}
!13 = distinct !{!13, !10}


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