; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2019-20/Open/Silver (socdist)

; 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::vector.3" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"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::allocator" = type { i8 }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i64, i64 }

@.str.3 = external hidden unnamed_addr constant [1 x i8], align 1
@N = external dso_local global i32, align 4
@M = external dso_local global i32, align 4
@v = external dso_local global %"class.std::vector.3", align 8
@.str.15 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [109 x i8], align 1
@__PRETTY_FUNCTION__.main = external hidden unnamed_addr constant [11 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

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5setIONSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z2okx(i64 noundef) #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 %"class.std::__cxx11::basic_string", align 8
  %3 = alloca %"class.std::allocator", align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #7
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #7
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %2, ptr noundef @.str.3, ptr noundef nonnull align 1 dereferenceable(1) %3)
          to label %11 unwind label %44

11:                                               ; preds = %0
  invoke void @_Z5setIONSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %2)
          to label %12 unwind label %48

12:                                               ; preds = %11
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #7
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #7
  call void @_Z2reIiJiEEvRT_DpRT0_(ptr noundef nonnull align 4 dereferenceable(4) @N, ptr noundef nonnull align 4 dereferenceable(4) @M)
  %13 = load i32, ptr @M, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) @v, i64 noundef %14)
  call void @_Z2reISt4pairIxxEEvRSt6vectorIT_SaIS3_EE(ptr noundef nonnull align 8 dereferenceable(24) @v)
  %15 = call ptr @_ZSt5beginISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_5beginEERT_(ptr noundef nonnull align 8 dereferenceable(24) @v)
  %16 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %15, ptr %16, align 8
  %17 = call ptr @_ZSt3endISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_3endEERT_(ptr noundef nonnull align 8 dereferenceable(24) @v)
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8
  %21 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8
  call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %20, ptr %22)
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #7
  store i64 0, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #7
  %23 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #7
  %24 = getelementptr inbounds %"struct.std::pair", ptr %23, i32 0, i32 1
  %25 = load i64, ptr %24, align 8, !tbaa !11
  %26 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5frontEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #7
  %27 = getelementptr inbounds %"struct.std::pair", ptr %26, i32 0, i32 0
  %28 = load i64, ptr %27, align 8, !tbaa !13
  %29 = sub nsw i64 %25, %28
  store i64 %29, ptr %9, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %56, %12
  %31 = load i64, ptr %8, align 8, !tbaa !9
  %32 = load i64, ptr %9, align 8, !tbaa !9
  %33 = icmp slt i64 %31, %32
  br i1 %33, label %34, label %57

34:                                               ; preds = %30
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #7
  %35 = load i64, ptr %8, align 8, !tbaa !9
  %36 = load i64, ptr %9, align 8, !tbaa !9
  %37 = add nsw i64 %35, %36
  %38 = add nsw i64 %37, 1
  %39 = sdiv i64 %38, 2
  store i64 %39, ptr %10, align 8, !tbaa !9
  %40 = load i64, ptr %10, align 8, !tbaa !9
  %41 = call noundef zeroext i1 @_Z2okx(i64 noundef %40)
  br i1 %41, label %42, label %53

42:                                               ; preds = %34
  %43 = load i64, ptr %10, align 8, !tbaa !9
  store i64 %43, ptr %8, align 8, !tbaa !9
  br label %56

44:                                               ; preds = %0
  %45 = landingpad { ptr, i32 }
          cleanup
  %46 = extractvalue { ptr, i32 } %45, 0
  store ptr %46, ptr %4, align 8
  %47 = extractvalue { ptr, i32 } %45, 1
  store i32 %47, ptr %5, align 4
  br label %52

48:                                               ; preds = %11
  %49 = landingpad { ptr, i32 }
          cleanup
  %50 = extractvalue { ptr, i32 } %49, 0
  store ptr %50, ptr %4, align 8
  %51 = extractvalue { ptr, i32 } %49, 1
  store i32 %51, ptr %5, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %2) #7
  br label %52

52:                                               ; preds = %48, %44
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %3) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #7
  br label %65

53:                                               ; preds = %34
  %54 = load i64, ptr %10, align 8, !tbaa !9
  %55 = sub nsw i64 %54, 1
  store i64 %55, ptr %9, align 8, !tbaa !9
  br label %56

56:                                               ; preds = %53, %42
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #7
  br label %30, !llvm.loop !14

57:                                               ; preds = %30
  %58 = load i64, ptr %8, align 8, !tbaa !9
  %59 = icmp ne i64 %58, 0
  br i1 %59, label %60, label %61

60:                                               ; preds = %57
  br label %63

61:                                               ; preds = %57
  call void @__assert_fail(ptr noundef @.str.15, ptr noundef @.str.16, i32 noundef 162, ptr noundef @__PRETTY_FUNCTION__.main) #8
  unreachable

62:                                               ; No predecessors!
  br label %63

63:                                               ; preds = %62, %60
  call void @_Z2psIxJEEvRKT_DpRKT0_(ptr noundef nonnull align 8 dereferenceable(8) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #7
  %64 = load i32, ptr %1, align 4
  ret i32 %64

65:                                               ; preds = %52
  %66 = load ptr, ptr %4, align 8
  %67 = load i32, ptr %5, align 4
  %68 = insertvalue { ptr, i32 } poison, ptr %66, 0
  %69 = insertvalue { ptr, i32 } %68, i32 %67, 1
  resume { ptr, i32 } %69
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2reIiJiEEvRT_DpRT0_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2reISt4pairIxxEEvRSt6vectorIT_SaIS3_EE(ptr noundef nonnull align 8 dereferenceable(24)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) #4

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local ptr @_ZSt5beginISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_5beginEERT_(ptr noundef nonnull align 8 dereferenceable(24)) #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local ptr @_ZSt3endISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_3endEERT_(ptr noundef nonnull align 8 dereferenceable(24)) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5frontEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #6

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2psIxJEEvRKT_DpRKT0_(ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = { 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 #5 = { inlinehint 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 #6 = { noreturn 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 #7 = { nounwind }
attributes #8 = { noreturn 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 = !{!"long long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTSSt4pairIxxE", !10, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

%"class.std::vector.3" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"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::allocator" = type { i8 }

@.str.3 = external hidden unnamed_addr constant [1 x i8], align 1
@N = external dso_local global i32, align 4
@M = external dso_local global i32, align 4
@v = external dso_local global %"class.std::vector.3", align 8
@.str.15 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [109 x i8], align 1
@__PRETTY_FUNCTION__.main = external hidden unnamed_addr constant [11 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

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; 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 nounwind uwtable
declare void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5setIONSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z2okx(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 personality ptr @__gxx_personality_v0 {
  %1 = alloca %"class.std::__cxx11::basic_string", align 8
  %2 = alloca %"class.std::allocator", align 1
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #7
  call void @_ZNSaIcEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %2) #7
  invoke void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2IS3_EEPKcRKS3_(ptr noundef nonnull align 8 dereferenceable(32) %1, ptr noundef nonnull @.str.3, ptr noundef nonnull align 1 dereferenceable(1) %2)
          to label %4 unwind label %23

4:                                                ; preds = %0
  invoke void @_Z5setIONSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull %1)
          to label %5 unwind label %25

5:                                                ; preds = %4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #7
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %2) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #7
  call void @_Z2reIiJiEEvRT_DpRT0_(ptr noundef nonnull align 4 dereferenceable(4) @N, ptr noundef nonnull align 4 dereferenceable(4) @M)
  %6 = load i32, ptr @M, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) @v, i64 noundef %7)
  call void @_Z2reISt4pairIxxEEvRSt6vectorIT_SaIS3_EE(ptr noundef nonnull align 8 dereferenceable(24) @v)
  %8 = call ptr @_ZSt5beginISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_5beginEERT_(ptr noundef nonnull align 8 dereferenceable(24) @v)
  %9 = call ptr @_ZSt3endISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_3endEERT_(ptr noundef nonnull align 8 dereferenceable(24) @v)
  call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %8, ptr %9)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #7
  store i64 0, ptr %3, align 8, !tbaa !9
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #7
  %11 = getelementptr inbounds i8, ptr %10, i64 8
  %12 = load i64, ptr %11, align 8, !tbaa !11
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5frontEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #7
  %14 = load i64, ptr %13, align 8, !tbaa !13
  %15 = sub nsw i64 %12, %14
  %16 = icmp sgt i64 %15, 0
  br i1 %16, label %.lr.ph, label %._crit_edge.thread

.lr.ph:                                           ; preds = %5, %30
  %17 = phi i64 [ %31, %30 ], [ 0, %5 ]
  %.0813 = phi i64 [ %.1, %30 ], [ %15, %5 ]
  %18 = add i64 %.0813, 1
  %19 = add i64 %18, %17
  %20 = sdiv i64 %19, 2
  %21 = call noundef zeroext i1 @_Z2okx(i64 noundef %20)
  br i1 %21, label %22, label %28

22:                                               ; preds = %.lr.ph
  store i64 %20, ptr %3, align 8, !tbaa !9
  br label %30

23:                                               ; preds = %0
  %24 = landingpad { ptr, i32 }
          cleanup
  br label %27

25:                                               ; preds = %4
  %26 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #7
  br label %27

27:                                               ; preds = %25, %23
  %.pn = phi { ptr, i32 } [ %26, %25 ], [ %24, %23 ]
  call void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %2) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #7
  resume { ptr, i32 } %.pn

28:                                               ; preds = %.lr.ph
  %29 = add nsw i64 %20, -1
  br label %30

30:                                               ; preds = %28, %22
  %31 = phi i64 [ %20, %22 ], [ %17, %28 ]
  %.1 = phi i64 [ %.0813, %22 ], [ %29, %28 ]
  %32 = icmp slt i64 %31, %.1
  br i1 %32, label %.lr.ph, label %._crit_edge, !llvm.loop !14

._crit_edge:                                      ; preds = %30
  %33 = icmp eq i64 %31, 0
  br i1 %33, label %._crit_edge.thread, label %34

._crit_edge.thread:                               ; preds = %5, %._crit_edge
  call void @__assert_fail(ptr noundef nonnull @.str.15, ptr noundef nonnull @.str.16, i32 noundef 162, ptr noundef nonnull @__PRETTY_FUNCTION__.main) #8
  unreachable

34:                                               ; preds = %._crit_edge
  call void @_Z2psIxJEEvRKT_DpRKT0_(ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #7
  ret i32 0
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2reIiJiEEvRT_DpRT0_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2reISt4pairIxxEEvRSt6vectorIT_SaIS3_EE(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local ptr @_ZSt5beginISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_5beginEERT_(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local ptr @_ZSt3endISt6vectorISt4pairIxxESaIS2_EEEDTcldtfp_3endEERT_(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE4backEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5frontEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #6

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2psIxJEEvRKT_DpRKT0_(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIcED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = { 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 #5 = { inlinehint 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 #6 = { noreturn 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 #7 = { nounwind }
attributes #8 = { noreturn 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 = !{!"long long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTSSt4pairIxxE", !10, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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