; LLVM IR from DionysiosB/CodeForces :: 0800-0899 (802J-SendTheFoolFurtherEasy)

; 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 @_Z3dfsiRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEElRl(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #0 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca %"struct.std::_Bit_reference", align 8
  %12 = alloca %"struct.std::_Bit_reference", align 8
  %13 = alloca i32, align 4
  %14 = alloca %"struct.std::_Bit_reference", align 8
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store i64 %3, ptr %9, align 8, !tbaa !11
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr %11) #3
  %15 = load ptr, ptr %8, align 8, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %15, i64 noundef %17)
  %19 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 0
  %20 = extractvalue { ptr, i64 } %18, 0
  store ptr %20, ptr %19, align 8
  %21 = getelementptr inbounds { ptr, i64 }, ptr %11, i32 0, i32 1
  %22 = extractvalue { ptr, i64 } %18, 1
  store i64 %22, ptr %21, align 8
  %23 = 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 %23, label %24, label %25

24:                                               ; preds = %5
  br label %98

25:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr %12) #3
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %26, 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
  %35 = load i64, ptr %9, align 8, !tbaa !11
  %36 = load ptr, ptr %10, align 8, !tbaa !9
  %37 = load i64, ptr %36, align 8, !tbaa !11
  %38 = icmp sgt i64 %35, %37
  br i1 %38, label %39, label %41

39:                                               ; preds = %25
  %40 = load i64, ptr %9, align 8, !tbaa !11
  br label %44

41:                                               ; preds = %25
  %42 = load ptr, ptr %10, align 8, !tbaa !9
  %43 = load i64, ptr %42, align 8, !tbaa !11
  br label %44

44:                                               ; preds = %41, %39
  %45 = phi i64 [ %40, %39 ], [ %43, %41 ]
  %46 = load ptr, ptr %10, align 8, !tbaa !9
  store i64 %45, ptr %46, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  store i32 0, ptr %13, align 4, !tbaa !5
  br label %47

47:                                               ; preds = %94, %44
  %48 = load i32, ptr %13, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = load ptr, ptr %7, align 8, !tbaa !9
  %51 = load i32, ptr %6, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %50, i64 noundef %52) #3
  %54 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %53) #3
  %55 = icmp ult i64 %49, %54
  br i1 %55, label %57, label %56

56:                                               ; preds = %47
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  br label %97

57:                                               ; preds = %47
  %58 = load ptr, ptr %7, align 8, !tbaa !9
  %59 = load i32, ptr %6, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %58, i64 noundef %60) #3
  %62 = load i32, ptr %13, align 4, !tbaa !5
  %63 = sext i32 %62 to i64
  %64 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %61, i64 noundef %63) #3
  %65 = load i64, ptr %64, align 8, !tbaa !11
  %66 = icmp eq i64 %65, 0
  br i1 %66, label %67, label %68

67:                                               ; preds = %57
  br label %94

68:                                               ; preds = %57
  call void @llvm.lifetime.start.p0(i64 16, ptr %14) #3
  %69 = load ptr, ptr %8, align 8, !tbaa !9
  %70 = load i32, ptr %13, align 4, !tbaa !5
  %71 = sext i32 %70 to i64
  %72 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %69, i64 noundef %71)
  %73 = getelementptr inbounds { ptr, i64 }, ptr %14, i32 0, i32 0
  %74 = extractvalue { ptr, i64 } %72, 0
  store ptr %74, ptr %73, align 8
  %75 = getelementptr inbounds { ptr, i64 }, ptr %14, i32 0, i32 1
  %76 = extractvalue { ptr, i64 } %72, 1
  store i64 %76, ptr %75, align 8
  %77 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %14) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %14) #3
  br i1 %77, label %78, label %79

78:                                               ; preds = %68
  br label %94

79:                                               ; preds = %68
  %80 = load i32, ptr %13, align 4, !tbaa !5
  %81 = load ptr, ptr %7, align 8, !tbaa !9
  %82 = load ptr, ptr %8, align 8, !tbaa !9
  %83 = load i64, ptr %9, align 8, !tbaa !11
  %84 = load ptr, ptr %7, align 8, !tbaa !9
  %85 = load i32, ptr %6, align 4, !tbaa !5
  %86 = sext i32 %85 to i64
  %87 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %84, i64 noundef %86) #3
  %88 = load i32, ptr %13, align 4, !tbaa !5
  %89 = sext i32 %88 to i64
  %90 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %87, i64 noundef %89) #3
  %91 = load i64, ptr %90, align 8, !tbaa !11
  %92 = add nsw i64 %83, %91
  %93 = load ptr, ptr %10, align 8, !tbaa !9
  call void @_Z3dfsiRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEElRl(i32 noundef %80, ptr noundef nonnull align 8 dereferenceable(24) %81, ptr noundef nonnull align 8 dereferenceable(40) %82, i64 noundef %92, ptr noundef nonnull align 8 dereferenceable(8) %93)
  br label %94

94:                                               ; preds = %79, %78, %67
  %95 = load i32, ptr %13, align 4, !tbaa !5
  %96 = add nsw i32 %95, 1
  store i32 %96, ptr %13, align 4, !tbaa !5
  br label %47, !llvm.loop !13

97:                                               ; preds = %56
  br label %98

98:                                               ; preds = %97, %24
  ret void
}

; 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

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 = !{!"int", !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 = !{!"long", !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 @_Z3dfsiRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEElRl(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %3, ptr nocapture noundef nonnull align 8 dereferenceable(8) %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) #4
  %9 = sext i32 %0 to i64
  %10 = tail call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %9)
  %11 = extractvalue { ptr, i64 } %10, 0
  store ptr %11, ptr %6, align 8
  %12 = getelementptr inbounds i8, ptr %6, i64 8
  %13 = extractvalue { ptr, i64 } %10, 1
  store i64 %13, ptr %12, align 8
  %14 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %6) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #4
  br i1 %14, label %.loopexit, label %15

15:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %7) #4
  %16 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %9)
  %17 = extractvalue { ptr, i64 } %16, 0
  store ptr %17, ptr %7, align 8
  %18 = getelementptr inbounds i8, ptr %7, i64 8
  %19 = extractvalue { ptr, i64 } %16, 1
  store i64 %19, ptr %18, align 8
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt14_Bit_referenceaSEb(ptr noundef nonnull align 8 dereferenceable(16) %7, i1 noundef zeroext true) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %7) #4
  %21 = load i64, ptr %4, align 8, !tbaa !5
  %. = call i64 @llvm.smax.i64(i64 %21, i64 %3)
  store i64 %., ptr %4, align 8, !tbaa !5
  %22 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %9) #4
  %23 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %22) #4
  %.not = icmp eq i64 %23, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %15
  %24 = getelementptr inbounds i8, ptr %8, i64 8
  br label %25

25:                                               ; preds = %.lr.ph, %41
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %41 ]
  %26 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %9) #4
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %26, i64 noundef %indvars.iv) #4
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = icmp eq i64 %28, 0
  br i1 %29, label %41, label %30

30:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %8) #4
  %31 = call { ptr, i64 } @_ZNSt6vectorIbSaIbEEixEm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %indvars.iv)
  %32 = extractvalue { ptr, i64 } %31, 0
  store ptr %32, ptr %8, align 8
  %33 = extractvalue { ptr, i64 } %31, 1
  store i64 %33, ptr %24, align 8
  %34 = call noundef zeroext i1 @_ZNKSt14_Bit_referencecvbEv(ptr noundef nonnull align 8 dereferenceable(16) %8) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %8) #4
  br i1 %34, label %41, label %35

35:                                               ; preds = %30
  %36 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %9) #4
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIlSaIlEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %36, i64 noundef %indvars.iv) #4
  %38 = load i64, ptr %37, align 8, !tbaa !5
  %39 = add nsw i64 %38, %3
  %40 = trunc nuw nsw i64 %indvars.iv to i32
  call void @_Z3dfsiRKSt6vectorIS_IlSaIlEESaIS1_EERS_IbSaIbEElRl(i32 noundef %40, ptr noundef nonnull align 8 dereferenceable(24) %1, ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %39, ptr noundef nonnull align 8 dereferenceable(8) %4)
  br label %41

41:                                               ; preds = %30, %25, %35
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %42 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt6vectorIS_IlSaIlEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %9) #4
  %43 = call noundef i64 @_ZNKSt6vectorIlSaIlEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %42) #4
  %44 = icmp ugt i64 %43, %indvars.iv.next
  br i1 %44, label %25, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %41, %15, %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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #3

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 = { 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,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass