; LLVM IR from DionysiosB/CodeForces :: 1100-1199 (1173B-NauuoAndChess)

; 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 [7 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 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)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = sdiv i64 %7, 2
  %9 = add nsw i64 %8, 1
  store i64 %9, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %20, %0
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = icmp sle i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %23

17:                                               ; preds = %12
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %18)
  br label %20

20:                                               ; preds = %17
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %22 = add nsw i64 %21, 1
  store i64 %22, ptr %4, align 8, !tbaa !5
  br label %12, !llvm.loop !9

23:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 2, ptr %5, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %36, %23
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = sub nsw i64 %26, %27
  %29 = add nsw i64 %28, 1
  %30 = icmp sle i64 %25, %29
  br i1 %30, label %32, label %31

31:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %39

32:                                               ; preds = %24
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %33, i64 noundef %34)
  br label %36

36:                                               ; preds = %32
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = add nsw i64 %37, 1
  store i64 %38, ptr %5, align 8, !tbaa !5
  br label %24, !llvm.loop !11

39:                                               ; preds = %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #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

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 [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 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 = sdiv i64 %3, 2
  %5 = add nsw i64 %4, 1
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %5)
  %.not13 = icmp slt i64 %3, -1
  br i1 %.not13, label %.preheader, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %0
  %7 = add nsw i64 %4, 1
  br label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %0
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %9 = sub i64 %8, %4
  %.not1215 = icmp slt i64 %9, 2
  br i1 %.not1215, label %._crit_edge, label %.lr.ph17

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.01014 = phi i64 [ %11, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.01014)
  %11 = add nuw nsw i64 %.01014, 1
  %exitcond = icmp eq i64 %.01014, %7
  br i1 %exitcond, label %.preheader, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph17, %.preheader
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0

.lr.ph17:                                         ; preds = %.preheader, %.lr.ph17
  %.016 = phi i64 [ %13, %.lr.ph17 ], [ 2, %.preheader ]
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %5, i64 noundef %.016)
  %13 = add nuw nsw i64 %.016, 1
  %14 = load i64, ptr %1, align 8, !tbaa !5
  %15 = sub i64 %14, %4
  %.not12.not = icmp slt i64 %.016, %15
  br i1 %.not12.not, label %.lr.ph17, label %._crit_edge, !llvm.loop !11
}

; 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

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}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass