; LLVM IR from DionysiosB/CodeForces :: 2038L-BridgeRenovation (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 [2 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 i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = icmp eq i64 %9, 1
  br i1 %10, label %11, label %13

11:                                               ; preds = %0
  %12 = call i32 @puts(ptr noundef @.str.1)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %52

13:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %14 = load i64, ptr %2, align 8, !tbaa !5
  store i64 %14, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %15 = load i64, ptr %2, align 8, !tbaa !5
  store i64 %15, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %16 = load i64, ptr %2, align 8, !tbaa !5
  store i64 %16, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = sdiv i64 %17, 2
  store i64 %18, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %5, align 8, !tbaa !5
  %20 = srem i64 %19, 2
  store i64 %20, ptr %5, align 8, !tbaa !5
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = sdiv i64 %21, 2
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = sub nsw i64 %23, %22
  store i64 %24, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = icmp ne i64 %25, 0
  br i1 %26, label %27, label %32

27:                                               ; preds = %13
  %28 = load i64, ptr %7, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = sub nsw i64 %30, 2
  store i64 %31, ptr %4, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %27, %13
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = icmp ne i64 %33, 0
  br i1 %34, label %35, label %42

35:                                               ; preds = %32
  %36 = load i64, ptr %4, align 8, !tbaa !5
  %37 = sdiv i64 %36, 3
  %38 = load i64, ptr %7, align 8, !tbaa !5
  %39 = add nsw i64 %38, %37
  store i64 %39, ptr %7, align 8, !tbaa !5
  %40 = load i64, ptr %4, align 8, !tbaa !5
  %41 = srem i64 %40, 3
  store i64 %41, ptr %4, align 8, !tbaa !5
  br label %42

42:                                               ; preds = %35, %32
  %43 = load i64, ptr %4, align 8, !tbaa !5
  %44 = load i64, ptr %6, align 8, !tbaa !5
  %45 = add nsw i64 %43, %44
  %46 = add nsw i64 %45, 1
  %47 = sdiv i64 %46, 2
  %48 = load i64, ptr %7, align 8, !tbaa !5
  %49 = add nsw i64 %48, %47
  store i64 %49, ptr %7, align 8, !tbaa !5
  %50 = load i64, ptr %7, align 8, !tbaa !5
  %51 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %50)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %52

52:                                               ; preds = %42, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %53 = load i32, ptr %1, align 4
  ret i32 %53
}

; 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 @puts(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"}


; 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 [2 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
  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 = icmp eq i64 %3, 1
  br i1 %4, label %5, label %7

5:                                                ; preds = %0
  %6 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %22

7:                                                ; preds = %0
  %8 = sdiv i64 %3, 2
  %9 = sub nsw i64 %3, %8
  %10 = and i64 %3, 1
  %.not = icmp eq i64 %10, 0
  %11 = add nsw i64 %9, -2
  %.015 = select i1 %.not, i64 %9, i64 %11
  %.0 = add nsw i64 %8, %10
  %.not18 = icmp eq i64 %.015, 0
  br i1 %.not18, label %16, label %12

12:                                               ; preds = %7
  %13 = sdiv i64 %.015, 3
  %14 = add nsw i64 %13, %.0
  %15 = srem i64 %.015, 3
  br label %16

16:                                               ; preds = %12, %7
  %.116 = phi i64 [ %15, %12 ], [ 0, %7 ]
  %.1 = phi i64 [ %14, %12 ], [ %.0, %7 ]
  %17 = add i64 %3, 1
  %18 = add i64 %17, %.116
  %19 = sdiv i64 %18, 2
  %20 = add nsw i64 %19, %.1
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %20)
  br label %22

22:                                               ; preds = %16, %5
  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 @puts(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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass