; LLVM IR from DionysiosB/CodeForces :: 0700-0799 (734E-AntonAndTree-OLD)

; 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"

%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERKS_IiSaIiEEl(i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %4) #0 {
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %11 = alloca %"struct.std::_Bit_reference", align 8
  %12 = alloca %"struct.std::_Bit_reference", align 8
  %13 = alloca i64, align 8
  %14 = alloca i32, align 4
  %15 = alloca i64, align 8
  %16 = alloca %"struct.std::_Bit_reference", align 8
  store i64 %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store i64 %4, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %11) #3
  %17 = load ptr, ptr %8, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %17, i64 noundef %18)
  %20 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 0
  %21 = extractvalue { ptr, i64 } %19, 0
  store ptr %21, ptr %20, align 8
  %22 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 1
  %23 = extractvalue { ptr, i64 } %19, 1
  store i64 %23, ptr %22, align 8
  %24 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %11) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %11) #3
  br i1 %24, label %25, label %26

25:                                               ; preds = %5
  br label %82

26:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr %12) #3
  %27 = load ptr, ptr %8, align 8, !tbaa !9
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %27, i64 noundef %28)
  %30 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 0
  %31 = extractvalue { ptr, i64 } %29, 0
  store ptr %31, ptr %30, align 8
  %32 = getelementptr inbounds { ptr, i64 }, ptr %12, i32 0, i32 1
  %33 = extractvalue { ptr, i64 } %29, 1
  store i64 %33, ptr %32, align 8
  %34 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %12, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %12) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #3
  store i64 0, ptr %13, align 8, !tbaa !5
  br label %35

35:                                               ; preds = %78, %26
  %36 = load i64, ptr %13, align 8, !tbaa !5
  %37 = load ptr, ptr %7, align 8, !tbaa !9
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %37, i64 noundef %38) #3
  %40 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %39) #3
  %41 = icmp ult i64 %36, %40
  br i1 %41, label %43, label %42

42:                                               ; preds = %35
  store i32 2, ptr %14, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #3
  br label %81

43:                                               ; preds = %35
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #3
  %44 = load ptr, ptr %7, align 8, !tbaa !9
  %45 = load i64, ptr %6, align 8, !tbaa !5
  %46 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %44, i64 noundef %45) #3
  %47 = load i64, ptr %13, align 8, !tbaa !5
  %48 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %46, i64 noundef %47) #3
  %49 = load i64, ptr %48, align 8, !tbaa !5
  store i64 %49, ptr %15, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %16) #3
  %50 = load ptr, ptr %8, align 8, !tbaa !9
  %51 = load i64, ptr %15, align 8, !tbaa !5
  %52 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %50, i64 noundef %51)
  %53 = getelementptr inbounds { ptr, i64 }, ptr %16, i32 0, i32 0
  %54 = extractvalue { ptr, i64 } %52, 0
  store ptr %54, ptr %53, align 8
  %55 = getelementptr inbounds { ptr, i64 }, ptr %16, i32 0, i32 1
  %56 = extractvalue { ptr, i64 } %52, 1
  store i64 %56, ptr %55, align 8
  %57 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %16) #3
  br i1 %57, label %66, label %58

58:                                               ; preds = %43
  %59 = load ptr, ptr %9, align 8, !tbaa !9
  %60 = load i64, ptr %15, align 8, !tbaa !5
  %61 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %59, i64 noundef %60) #3
  %62 = load i32, ptr %61, align 4, !tbaa !11
  %63 = sext i32 %62 to i64
  %64 = load i64, ptr %10, align 8, !tbaa !5
  %65 = icmp ne i64 %63, %64
  br label %66

66:                                               ; preds = %58, %43
  %67 = phi i1 [ true, %43 ], [ %65, %58 ]
  call void @llvm.lifetime.end.p0(i64 16, ptr %16) #3
  br i1 %67, label %68, label %69

68:                                               ; preds = %66
  store i32 4, ptr %14, align 4
  br label %75

69:                                               ; preds = %66
  %70 = load i64, ptr %15, align 8, !tbaa !5
  %71 = load ptr, ptr %7, align 8, !tbaa !9
  %72 = load ptr, ptr %8, align 8, !tbaa !9
  %73 = load ptr, ptr %9, align 8, !tbaa !9
  %74 = load i64, ptr %10, align 8, !tbaa !5
  call void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERKS_IiSaIiEEl(i64 noundef %70, ptr noundef nonnull align 8 dereferenceable(24) %71, ptr noundef nonnull align 8 dereferenceable(40) %72, ptr noundef nonnull align 8 dereferenceable(24) %73, i64 noundef %74)
  store i32 0, ptr %14, align 4
  br label %75

75:                                               ; preds = %69, %68
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #3
  %76 = load i32, ptr %14, align 4
  switch i32 %76, label %83 [
    i32 0, label %77
    i32 4, label %78
  ]

77:                                               ; preds = %75
  br label %78

78:                                               ; preds = %77, %75
  %79 = load i64, ptr %13, align 8, !tbaa !5
  %80 = add nsw i64 %79, 1
  store i64 %80, ptr %13, align 8, !tbaa !5
  br label %35, !llvm.loop !13

81:                                               ; preds = %42
  br label %82

82:                                               ; preds = %81, %25
  ret void

83:                                               ; preds = %75
  unreachable
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

attributes #0 = { mustprogress 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 = { mustprogress 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 #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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

%"struct.std::_Bit_reference" = type { ptr, i64 }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERKS_IiSaIiEEl(i64 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %4) local_unnamed_addr #0 {
  %6 = alloca %"struct.std::_Bit_reference", align 8
  %7 = alloca %"struct.std::_Bit_reference", align 8
  %8 = alloca %"struct.std::_Bit_reference", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %6) #3
  %9 = tail call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %0)
  %10 = extractvalue { ptr, i64 } %9, 0
  store ptr %10, ptr %6, align 8
  %11 = getelementptr inbounds i8, ptr %6, i64 8
  %12 = extractvalue { ptr, i64 } %9, 1
  store i64 %12, ptr %11, align 8
  %13 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %6) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #3
  br i1 %13, label %.loopexit, label %14

14:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %7) #3
  %15 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %0)
  %16 = extractvalue { ptr, i64 } %15, 0
  store ptr %16, ptr %7, align 8
  %17 = getelementptr inbounds i8, ptr %7, i64 8
  %18 = extractvalue { ptr, i64 } %15, 1
  store i64 %18, ptr %17, align 8
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %7, i1 noundef zeroext true) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %7) #3
  %20 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %21 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %20) #3
  %.not22 = icmp eq i64 %21, 0
  br i1 %.not22, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %14
  %22 = getelementptr inbounds i8, ptr %8, i64 8
  br label %23

23:                                               ; preds = %.lr.ph, %36
  %.021 = phi i64 [ 0, %.lr.ph ], [ %37, %36 ]
  %24 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %24, i64 noundef %.021) #3
  %26 = load i64, ptr %25, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %8) #3
  %27 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %26)
  %28 = extractvalue { ptr, i64 } %27, 0
  store ptr %28, ptr %8, align 8
  %29 = extractvalue { ptr, i64 } %27, 1
  store i64 %29, ptr %22, align 8
  %30 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %8) #3
  br i1 %30, label %.critedge, label %31

31:                                               ; preds = %23
  %32 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %26) #3
  %33 = load i32, ptr %32, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %.not = icmp eq i64 %34, %4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %8) #3
  br i1 %.not, label %35, label %36

.critedge:                                        ; preds = %23
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %8) #3
  br label %36

35:                                               ; preds = %31
  call void @_Z3dfslRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEERKS_IiSaIiEEl(i64 noundef %26, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %4)
  br label %36

36:                                               ; preds = %31, %.critedge, %35
  %37 = add nuw nsw i64 %.021, 1
  %38 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %0) #3
  %39 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %38) #3
  %40 = icmp ult i64 %37, %39
  br i1 %40, label %23, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %36, %14, %5
  ret void
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2 align 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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16), i1 noundef zeroext) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress 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 = { mustprogress 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 #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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass