; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (877C-SlavaAndTanks)

; 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 [5 x i8], align 1
@.str.3 = 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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = mul nsw i64 3, %7
  %9 = sdiv i64 %8, 2
  %10 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %9)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 2, ptr %3, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %19, %0
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = icmp sle i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %22

16:                                               ; preds = %11
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %17)
  br label %19

19:                                               ; preds = %16
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = add nsw i64 %20, 2
  store i64 %21, ptr %3, align 8, !tbaa !5
  br label %11, !llvm.loop !9

22:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %31, %22
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %2, align 8, !tbaa !5
  %26 = icmp sle i64 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %34

28:                                               ; preds = %23
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %29)
  br label %31

31:                                               ; preds = %28
  %32 = load i64, ptr %4, align 8, !tbaa !5
  %33 = add nsw i64 %32, 2
  store i64 %33, ptr %4, align 8, !tbaa !5
  br label %23, !llvm.loop !11

34:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 2, ptr %5, align 8, !tbaa !5
  br label %35

35:                                               ; preds = %43, %34
  %36 = load i64, ptr %5, align 8, !tbaa !5
  %37 = load i64, ptr %2, align 8, !tbaa !5
  %38 = icmp sle i64 %36, %37
  br i1 %38, label %40, label %39

39:                                               ; preds = %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %46

40:                                               ; preds = %35
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %41)
  br label %43

43:                                               ; preds = %40
  %44 = load i64, ptr %5, align 8, !tbaa !5
  %45 = add nsw i64 %44, 2
  store i64 %45, ptr %5, align 8, !tbaa !5
  br label %35, !llvm.loop !12

46:                                               ; preds = %39
  %47 = call i32 @puts(ptr noundef @.str.3)
  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

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 [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %4 = mul nsw i64 %3, 3
  %5 = sdiv i64 %4, 2
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %5)
  %7 = load i64, ptr %1, align 8, !tbaa !5
  %.not14 = icmp slt i64 %7, 2
  br i1 %.not14, label %.preheader13, label %.lr.ph

.preheader13:                                     ; preds = %.lr.ph, %0
  %8 = phi i64 [ %7, %0 ], [ %11, %.lr.ph ]
  %.not1116 = icmp slt i64 %8, 1
  br i1 %.not1116, label %._crit_edge, label %.lr.ph18

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.01015 = phi i64 [ %10, %.lr.ph ], [ 2, %0 ]
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.01015)
  %10 = add nuw nsw i64 %.01015, 2
  %11 = load i64, ptr %1, align 8, !tbaa !5
  %.not = icmp sgt i64 %10, %11
  br i1 %.not, label %.preheader13, label %.lr.ph, !llvm.loop !9

.preheader:                                       ; preds = %.lr.ph18
  %12 = icmp slt i64 %15, 2
  br i1 %12, label %._crit_edge, label %.lr.ph21

.lr.ph18:                                         ; preds = %.preheader13, %.lr.ph18
  %.0917 = phi i64 [ %14, %.lr.ph18 ], [ 1, %.preheader13 ]
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0917)
  %14 = add nuw nsw i64 %.0917, 2
  %15 = load i64, ptr %1, align 8, !tbaa !5
  %.not11 = icmp sgt i64 %14, %15
  br i1 %.not11, label %.preheader, label %.lr.ph18, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph21, %.preheader13, %.preheader
  %16 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0

.lr.ph21:                                         ; preds = %.preheader, %.lr.ph21
  %.020 = phi i64 [ %18, %.lr.ph21 ], [ 2, %.preheader ]
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.020)
  %18 = add nuw nsw i64 %.020, 2
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %.not12 = icmp sgt i64 %18, %19
  br i1 %.not12, label %._crit_edge, label %.lr.ph21, !llvm.loop !12
}

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