; LLVM IR from Hunterdii/GeeksforGeeks-POTD :: March 2024 GFG SOLUTION (March-21)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::vector.6" = type { %"struct.std::_Vector_base.7" }
%"struct.std::_Vector_base.7" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.Solution = type { i8 }

@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z9buildTreeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef) #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca %"class.std::__cxx11::basic_string", align 8
  %9 = alloca %"class.std::vector.6", align 8
  %10 = alloca %class.Solution, align 1
  %11 = alloca %"class.std::vector.6", align 8
  %12 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %2)
  br label %14

14:                                               ; preds = %67, %0
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %2, align 4, !tbaa !5
  %17 = icmp ne i32 %15, 0
  br i1 %17, label %18, label %75

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 32, ptr %3) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #6
  %19 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) %3)
          to label %20 unwind label %33

20:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #6
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %8, ptr noundef nonnull align 8 dereferenceable(32) %3)
          to label %21 unwind label %37

21:                                               ; preds = %20
  %22 = invoke noundef ptr @_Z9buildTreeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %8)
          to label %23 unwind label %41

23:                                               ; preds = %21
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #6
  store ptr %22, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %9) #6
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #6
  call void @llvm.lifetime.start.p0(i64 1, ptr %10) #6
  call void @llvm.lifetime.start.p0(i64 24, ptr %11) #6
  %24 = load ptr, ptr %7, align 8, !tbaa !9
  invoke void @_ZN8Solution15zigZagTraversalEP4Node(ptr dead_on_unwind writable sret(%"class.std::vector.6") align 8 %11, ptr noundef nonnull align 1 dereferenceable(1) %10, ptr noundef %24)
          to label %25 unwind label %45

25:                                               ; preds = %23
  %26 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIiSaIiEEaSEOS1_(ptr noundef nonnull align 8 dereferenceable(24) %9, ptr noundef nonnull align 8 dereferenceable(24) %11) #6
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #6
  store i32 0, ptr %12, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %58, %25
  %28 = load i32, ptr %12, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #6
  %31 = icmp ult i64 %29, %30
  br i1 %31, label %49, label %32

32:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #6
  br label %65

33:                                               ; preds = %18
  %34 = landingpad { ptr, i32 }
          cleanup
  %35 = extractvalue { ptr, i32 } %34, 0
  store ptr %35, ptr %5, align 8
  %36 = extractvalue { ptr, i32 } %34, 1
  store i32 %36, ptr %6, align 4
  br label %74

37:                                               ; preds = %20
  %38 = landingpad { ptr, i32 }
          cleanup
  %39 = extractvalue { ptr, i32 } %38, 0
  store ptr %39, ptr %5, align 8
  %40 = extractvalue { ptr, i32 } %38, 1
  store i32 %40, ptr %6, align 4
  br label %73

41:                                               ; preds = %21
  %42 = landingpad { ptr, i32 }
          cleanup
  %43 = extractvalue { ptr, i32 } %42, 0
  store ptr %43, ptr %5, align 8
  %44 = extractvalue { ptr, i32 } %42, 1
  store i32 %44, ptr %6, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #6
  br label %73

45:                                               ; preds = %23
  %46 = landingpad { ptr, i32 }
          cleanup
  %47 = extractvalue { ptr, i32 } %46, 0
  store ptr %47, ptr %5, align 8
  %48 = extractvalue { ptr, i32 } %46, 1
  store i32 %48, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #6
  br label %72

49:                                               ; preds = %27
  %50 = load i32, ptr %12, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %9, i64 noundef %51) #6
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %53)
          to label %55 unwind label %61

55:                                               ; preds = %49
  %56 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %54, ptr noundef @.str.2)
          to label %57 unwind label %61

57:                                               ; preds = %55
  br label %58

58:                                               ; preds = %57
  %59 = load i32, ptr %12, align 4, !tbaa !5
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %12, align 4, !tbaa !5
  br label %27, !llvm.loop !11

61:                                               ; preds = %55, %49
  %62 = landingpad { ptr, i32 }
          cleanup
  %63 = extractvalue { ptr, i32 } %62, 0
  store ptr %63, ptr %5, align 8
  %64 = extractvalue { ptr, i32 } %62, 1
  store i32 %64, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #6
  br label %72

65:                                               ; preds = %32
  %66 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %67 unwind label %68

67:                                               ; preds = %65
  call void @llvm.lifetime.end.p0(i64 1, ptr %10) #6
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr %3) #6
  br label %14, !llvm.loop !13

68:                                               ; preds = %65
  %69 = landingpad { ptr, i32 }
          cleanup
  %70 = extractvalue { ptr, i32 } %69, 0
  store ptr %70, ptr %5, align 8
  %71 = extractvalue { ptr, i32 } %69, 1
  store i32 %71, ptr %6, align 4
  br label %72

72:                                               ; preds = %68, %61, %45
  call void @llvm.lifetime.end.p0(i64 1, ptr %10) #6
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %9) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #6
  br label %73

73:                                               ; preds = %72, %41, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #6
  br label %74

74:                                               ; preds = %73, %33
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  br label %76

75:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  ret i32 0

76:                                               ; preds = %74
  %77 = load ptr, ptr %5, align 8
  %78 = load i32, ptr %6, align 4
  %79 = insertvalue { ptr, i32 } poison, ptr %77, 0
  %80 = insertvalue { ptr, i32 } %79, i32 %78, 1
  resume { ptr, i32 } %80
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Solution15zigZagTraversalEP4Node(ptr dead_on_unwind noalias writable sret(%"class.std::vector.6") align 8, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIiSaIiEEaSEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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 #4 = { "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 #5 = { inlinehint 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 #6 = { 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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::vector.6" = type { %"struct.std::_Vector_base.7" }
%"struct.std::_Vector_base.7" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.Solution = type { i8 }

@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z9buildTreeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef) local_unnamed_addr #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca %"class.std::__cxx11::basic_string", align 8
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca %"class.std::vector.6", align 8
  %6 = alloca %class.Solution, align 1
  %7 = alloca %"class.std::vector.6", align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1)
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr %1, align 4, !tbaa !5
  %.not14 = icmp eq i32 %9, 0
  br i1 %.not14, label %._crit_edge17, label %.lr.ph16

.lr.ph16:                                         ; preds = %0, %38
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %2) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #7
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  %11 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) %2)
          to label %12 unwind label %20

12:                                               ; preds = %.lr.ph16
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2ERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(32) %2)
          to label %13 unwind label %22

13:                                               ; preds = %12
  %14 = invoke noundef ptr @_Z9buildTreeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull %4)
          to label %15 unwind label %24

15:                                               ; preds = %13
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #7
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #7
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %6) #7
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %7) #7
  invoke void @_ZN8Solution15zigZagTraversalEP4Node(ptr dead_on_unwind nonnull writable sret(%"class.std::vector.6") align 8 %7, ptr noundef nonnull align 1 dereferenceable(1) %6, ptr noundef %14)
          to label %16 unwind label %26

16:                                               ; preds = %15
  %17 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIiSaIiEEaSEOS1_(ptr noundef nonnull align 8 dereferenceable(24) %5, ptr noundef nonnull align 8 dereferenceable(24) %7) #7
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %7) #7
  %18 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  %.not18 = icmp eq i64 %18, 0
  br i1 %.not18, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %33, %16
  %19 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %38 unwind label %41

20:                                               ; preds = %.lr.ph16
  %21 = landingpad { ptr, i32 }
          cleanup
  br label %44

22:                                               ; preds = %12
  %23 = landingpad { ptr, i32 }
          cleanup
  br label %44

24:                                               ; preds = %13
  %25 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #7
  br label %44

26:                                               ; preds = %15
  %27 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %7) #7
  br label %43

.lr.ph:                                           ; preds = %16, %33
  %indvars.iv = phi i64 [ %indvars.iv.next, %33 ], [ 0, %16 ]
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %indvars.iv) #7
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %29)
          to label %31 unwind label %36

31:                                               ; preds = %.lr.ph
  %32 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %30, ptr noundef nonnull @.str.2)
          to label %33 unwind label %36

33:                                               ; preds = %31
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %34 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  %35 = icmp ugt i64 %34, %indvars.iv.next
  br i1 %35, label %.lr.ph, label %._crit_edge, !llvm.loop !9

36:                                               ; preds = %31, %.lr.ph
  %37 = landingpad { ptr, i32 }
          cleanup
  br label %43

38:                                               ; preds = %._crit_edge
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %6) #7
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #7
  %39 = load i32, ptr %1, align 4, !tbaa !5
  %40 = add nsw i32 %39, -1
  store i32 %40, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %39, 0
  br i1 %.not, label %._crit_edge17, label %.lr.ph16, !llvm.loop !11

41:                                               ; preds = %._crit_edge
  %42 = landingpad { ptr, i32 }
          cleanup
  br label %43

43:                                               ; preds = %41, %36, %26
  %.pn = phi { ptr, i32 } [ %37, %36 ], [ %42, %41 ], [ %27, %26 ]
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %6) #7
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #7
  br label %44

44:                                               ; preds = %22, %24, %43, %20
  %.pn.pn.pn = phi { ptr, i32 } [ %21, %20 ], [ %.pn, %43 ], [ %25, %24 ], [ %23, %22 ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn.pn.pn

._crit_edge17:                                    ; preds = %38, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8Solution15zigZagTraversalEP4Node(ptr dead_on_unwind noalias writable sret(%"class.std::vector.6") align 8, ptr noundef nonnull align 1 dereferenceable(1), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIiSaIiEEaSEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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 #4 = { 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 #5 = { inlinehint 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 #6 = { "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 #7 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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