; LLVM IR from DionysiosB/CodeForces :: 1200-1299 (1237A-BalancedRatingChanges)

; 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
  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
  store i64 0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %42, %0
  %8 = load i64, ptr %4, align 8, !tbaa !5
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = icmp slt i64 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %45

12:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5)
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = srem i64 %14, 2
  %16 = icmp ne i64 %15, 0
  br i1 %16, label %17, label %25

17:                                               ; preds = %12
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp sge i64 %18, 0
  br i1 %19, label %20, label %25

20:                                               ; preds = %17
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = add nsw i64 %21, -1
  store i64 %22, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = add nsw i64 %23, -1
  store i64 %24, ptr %3, align 8, !tbaa !5
  br label %38

25:                                               ; preds = %17, %12
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = srem i64 %26, 2
  %28 = icmp ne i64 %27, 0
  br i1 %28, label %29, label %37

29:                                               ; preds = %25
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = icmp slt i64 %30, 0
  br i1 %31, label %32, label %37

32:                                               ; preds = %29
  %33 = load i64, ptr %5, align 8, !tbaa !5
  %34 = add nsw i64 %33, 1
  store i64 %34, ptr %5, align 8, !tbaa !5
  %35 = load i64, ptr %3, align 8, !tbaa !5
  %36 = add nsw i64 %35, 1
  store i64 %36, ptr %3, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %32, %29, %25
  br label %38

38:                                               ; preds = %37, %20
  %39 = load i64, ptr %5, align 8, !tbaa !5
  %40 = sdiv i64 %39, 2
  %41 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %40)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %42

42:                                               ; preds = %38
  %43 = load i64, ptr %4, align 8, !tbaa !5
  %44 = add nsw i64 %43, 1
  store i64 %44, ptr %4, align 8, !tbaa !5
  br label %7, !llvm.loop !9

45:                                               ; preds = %11
  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"}


; 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
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = icmp sgt i64 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %17, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0

.lr.ph:                                           ; preds = %0, %17
  %.011 = phi i64 [ %21, %17 ], [ 0, %0 ]
  %.0910 = phi i64 [ %.1, %17 ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = and i64 %7, 1
  %9 = icmp ne i64 %8, 0
  %10 = icmp sgt i64 %.0910, -1
  %or.cond = select i1 %9, i1 %10, i1 false
  br i1 %or.cond, label %11, label %13

11:                                               ; preds = %.lr.ph
  %12 = add nsw i64 %7, -1
  store i64 %12, ptr %2, align 8, !tbaa !5
  br label %17

13:                                               ; preds = %.lr.ph
  %14 = icmp slt i64 %.0910, 0
  %or.cond3 = select i1 %9, i1 %14, i1 false
  br i1 %or.cond3, label %15, label %17

15:                                               ; preds = %13
  %16 = add nsw i64 %7, 1
  store i64 %16, ptr %2, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %13, %15, %11
  %18 = phi i64 [ %12, %11 ], [ %16, %15 ], [ %7, %13 ]
  %.1 = phi i64 [ -1, %11 ], [ 0, %15 ], [ %.0910, %13 ]
  %19 = sdiv i64 %18, 2
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %19)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %21 = add nuw nsw i64 %.011, 1
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = icmp slt i64 %21, %22
  br i1 %23, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; 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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass