; LLVM IR from DionysiosB/CodeForces :: 1200-1299 (1250L-DivideTheStudents)

; 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 [12 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 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 = %81, %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 %84

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = add nsw i64 %17, %18
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = add nsw i64 %19, %20
  %22 = add nsw i64 %21, 2
  %23 = sdiv i64 %22, 3
  store i64 %23, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %24 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %24, ptr %7, align 8, !tbaa !5
  %25 = load i64, ptr %3, align 8, !tbaa !5
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = icmp sge i64 %25, %26
  br i1 %27, label %32, label %28

28:                                               ; preds = %15
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = icmp sge i64 %29, %30
  br i1 %31, label %32, label %81

32:                                               ; preds = %28, %15
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = icmp slt i64 %33, %34
  br i1 %35, label %36, label %40

36:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %37 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %37, ptr %8, align 8, !tbaa !5
  %38 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %38, ptr %5, align 8, !tbaa !5
  %39 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %39, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %40

40:                                               ; preds = %36, %32
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = load i64, ptr %6, align 8, !tbaa !5
  %43 = icmp slt i64 %41, %42
  br i1 %43, label %44, label %57

44:                                               ; preds = %40
  %45 = load i64, ptr %6, align 8, !tbaa !5
  %46 = load i64, ptr %5, align 8, !tbaa !5
  %47 = sub nsw i64 %45, %46
  %48 = load i64, ptr %4, align 8, !tbaa !5
  %49 = sub nsw i64 %48, %47
  store i64 %49, ptr %4, align 8, !tbaa !5
  %50 = load i64, ptr %4, align 8, !tbaa !5
  %51 = icmp sgt i64 %50, 0
  br i1 %51, label %52, label %54

52:                                               ; preds = %44
  %53 = load i64, ptr %4, align 8, !tbaa !5
  br label %55

54:                                               ; preds = %44
  br label %55

55:                                               ; preds = %54, %52
  %56 = phi i64 [ %53, %52 ], [ 0, %54 ]
  store i64 %56, ptr %4, align 8, !tbaa !5
  br label %57

57:                                               ; preds = %55, %40
  %58 = load i64, ptr %6, align 8, !tbaa !5
  %59 = load i64, ptr %5, align 8, !tbaa !5
  %60 = icmp sgt i64 %58, %59
  br i1 %60, label %61, label %63

61:                                               ; preds = %57
  %62 = load i64, ptr %6, align 8, !tbaa !5
  br label %65

63:                                               ; preds = %57
  %64 = load i64, ptr %5, align 8, !tbaa !5
  br label %65

65:                                               ; preds = %63, %61
  %66 = phi i64 [ %62, %61 ], [ %64, %63 ]
  store i64 %66, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %67 = load i64, ptr %3, align 8, !tbaa !5
  %68 = load i64, ptr %4, align 8, !tbaa !5
  %69 = add nsw i64 %67, %68
  %70 = add nsw i64 %69, 1
  %71 = sdiv i64 %70, 2
  store i64 %71, ptr %9, align 8, !tbaa !5
  %72 = load i64, ptr %6, align 8, !tbaa !5
  %73 = load i64, ptr %9, align 8, !tbaa !5
  %74 = icmp sgt i64 %72, %73
  br i1 %74, label %75, label %77

75:                                               ; preds = %65
  %76 = load i64, ptr %6, align 8, !tbaa !5
  br label %79

77:                                               ; preds = %65
  %78 = load i64, ptr %9, align 8, !tbaa !5
  br label %79

79:                                               ; preds = %77, %75
  %80 = phi i64 [ %76, %75 ], [ %78, %77 ]
  store i64 %80, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  br label %81

81:                                               ; preds = %79, %28
  %82 = load i64, ptr %7, align 8, !tbaa !5
  %83 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %82)
  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
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %11, !llvm.loop !9

84:                                               ; preds = %11
  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

; 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"}


; 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 [12 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
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not19 = icmp eq i64 %6, 0
  br i1 %.not19, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %33
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8
  %12 = add i64 %9, 2
  %13 = add i64 %12, %10
  %14 = add i64 %13, %11
  %15 = sdiv i64 %14, 3
  %.not16 = icmp slt i64 %9, %10
  %.not17 = icmp slt i64 %11, %10
  %or.cond = select i1 %.not16, i1 %.not17, i1 false
  br i1 %or.cond, label %33, label %16

16:                                               ; preds = %.lr.ph
  %17 = icmp slt i64 %9, %11
  br i1 %17, label %18, label %19

18:                                               ; preds = %16
  store i64 %9, ptr %4, align 8, !tbaa !5
  store i64 %11, ptr %2, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %18, %16
  %20 = phi i64 [ %11, %18 ], [ %9, %16 ]
  %21 = phi i64 [ %9, %18 ], [ %11, %16 ]
  %22 = icmp slt i64 %21, %15
  br i1 %22, label %23, label %26

23:                                               ; preds = %19
  %.neg = sub i64 %10, %15
  %24 = add i64 %.neg, %21
  %25 = call i64 @llvm.smax.i64(i64 %24, i64 0)
  store i64 %25, ptr %3, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %23, %19
  %27 = phi i64 [ %25, %23 ], [ %10, %19 ]
  %28 = call i64 @llvm.smax.i64(i64 %15, i64 %21)
  %29 = add i64 %20, 1
  %30 = add i64 %29, %27
  %31 = sdiv i64 %30, 2
  %32 = call i64 @llvm.smax.i64(i64 %28, i64 %31)
  br label %33

33:                                               ; preds = %.lr.ph, %26
  %.0 = phi i64 [ %32, %26 ], [ %15, %.lr.ph ]
  %34 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %35 = load i64, ptr %1, align 8, !tbaa !5
  %36 = add nsw i64 %35, -1
  store i64 %36, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %35, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %33, %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.smax.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"}


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