; LLVM IR from DionysiosB/CodeForces :: 1839B-Lamps (main)

; 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" = 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::allocator" = type { i8 }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i64, i64 }

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z3cmpSt4pairIxxES0_(i64, i64, i64, i64) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #1 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca %"class.std::vector", align 8
  %5 = alloca %"class.std::allocator", align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  %13 = alloca i64, align 8
  %14 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %16

16:                                               ; preds = %116, %0
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %2, align 8, !tbaa !5
  %19 = icmp ne i64 %17, 0
  br i1 %19, label %20, label %123

20:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #6
  %22 = load i64, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #6
  call void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #6
  invoke void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %22, ptr noundef nonnull align 1 dereferenceable(1) %5)
          to label %23 unwind label %29

23:                                               ; preds = %20
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #6
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #6
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %42, %23
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = load i64, ptr %3, align 8, !tbaa !5
  %27 = icmp slt i64 %25, %26
  br i1 %27, label %33, label %28

28:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #6
  br label %49

29:                                               ; preds = %20
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %6, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %7, align 4
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #6
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #6
  br label %122

33:                                               ; preds = %24
  %34 = load i64, ptr %8, align 8, !tbaa !5
  %35 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %34) #6
  %36 = getelementptr inbounds %"struct.std::pair", ptr %35, i32 0, i32 0
  %37 = load i64, ptr %8, align 8, !tbaa !5
  %38 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %37) #6
  %39 = getelementptr inbounds %"struct.std::pair", ptr %38, i32 0, i32 1
  %40 = invoke i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %36, ptr noundef %39)
          to label %41 unwind label %45

41:                                               ; preds = %33
  br label %42

42:                                               ; preds = %41
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = add nsw i64 %43, 1
  store i64 %44, ptr %8, align 8, !tbaa !5
  br label %24, !llvm.loop !9

45:                                               ; preds = %33
  %46 = landingpad { ptr, i32 }
          cleanup
  %47 = extractvalue { ptr, i32 } %46, 0
  store ptr %47, ptr %6, align 8
  %48 = extractvalue { ptr, i32 } %46, 1
  store i32 %48, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #6
  br label %121

49:                                               ; preds = %28
  %50 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  %51 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %50, ptr %51, align 8
  %52 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  %53 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %52, ptr %53, align 8
  %54 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  %55 = load ptr, ptr %54, align 8
  %56 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  %57 = load ptr, ptr %56, align 8
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEPFbS3_S3_EEvT_SB_T0_(ptr %55, ptr %57, ptr noundef @_Z3cmpSt4pairIxxES0_)
          to label %58 unwind label %64

58:                                               ; preds = %49
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #6
  store i64 0, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #6
  store i64 0, ptr %12, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #6
  store i64 0, ptr %13, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #6
  store i64 0, ptr %14, align 8, !tbaa !5
  br label %59

59:                                               ; preds = %110, %58
  %60 = load i64, ptr %14, align 8, !tbaa !5
  %61 = load i64, ptr %3, align 8, !tbaa !5
  %62 = icmp slt i64 %60, %61
  br i1 %62, label %68, label %63

63:                                               ; preds = %59
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #6
  br label %113

64:                                               ; preds = %49
  %65 = landingpad { ptr, i32 }
          cleanup
  %66 = extractvalue { ptr, i32 } %65, 0
  store ptr %66, ptr %6, align 8
  %67 = extractvalue { ptr, i32 } %65, 1
  store i32 %67, ptr %7, align 4
  br label %121

68:                                               ; preds = %59
  %69 = load i64, ptr %14, align 8, !tbaa !5
  %70 = load i64, ptr %11, align 8, !tbaa !5
  %71 = icmp slt i64 %69, %70
  br i1 %71, label %72, label %73

72:                                               ; preds = %68
  br label %110

73:                                               ; preds = %68
  %74 = load i64, ptr %14, align 8, !tbaa !5
  %75 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %74) #6
  %76 = getelementptr inbounds %"struct.std::pair", ptr %75, i32 0, i32 1
  %77 = load i64, ptr %76, align 8, !tbaa !11
  %78 = load i64, ptr %13, align 8, !tbaa !5
  %79 = add nsw i64 %78, %77
  store i64 %79, ptr %13, align 8, !tbaa !5
  %80 = load i64, ptr %12, align 8, !tbaa !5
  %81 = add nsw i64 %80, 1
  store i64 %81, ptr %12, align 8, !tbaa !5
  br label %82

82:                                               ; preds = %95, %73
  %83 = load i64, ptr %11, align 8, !tbaa !5
  %84 = load i64, ptr %3, align 8, !tbaa !5
  %85 = icmp slt i64 %83, %84
  br i1 %85, label %86, label %93

86:                                               ; preds = %82
  %87 = load i64, ptr %11, align 8, !tbaa !5
  %88 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %87) #6
  %89 = getelementptr inbounds %"struct.std::pair", ptr %88, i32 0, i32 0
  %90 = load i64, ptr %89, align 8, !tbaa !13
  %91 = load i64, ptr %12, align 8, !tbaa !5
  %92 = icmp sle i64 %90, %91
  br label %93

93:                                               ; preds = %86, %82
  %94 = phi i1 [ false, %82 ], [ %92, %86 ]
  br i1 %94, label %95, label %98

95:                                               ; preds = %93
  %96 = load i64, ptr %11, align 8, !tbaa !5
  %97 = add nsw i64 %96, 1
  store i64 %97, ptr %11, align 8, !tbaa !5
  br label %82, !llvm.loop !14

98:                                               ; preds = %93
  %99 = load i64, ptr %14, align 8, !tbaa !5
  %100 = load i64, ptr %11, align 8, !tbaa !5
  %101 = sub nsw i64 %99, %100
  %102 = add nsw i64 %101, 1
  store i64 %102, ptr %12, align 8, !tbaa !5
  %103 = load i64, ptr %12, align 8, !tbaa !5
  %104 = icmp sgt i64 %103, 0
  br i1 %104, label %105, label %107

105:                                              ; preds = %98
  %106 = load i64, ptr %12, align 8, !tbaa !5
  br label %108

107:                                              ; preds = %98
  br label %108

108:                                              ; preds = %107, %105
  %109 = phi i64 [ %106, %105 ], [ 0, %107 ]
  store i64 %109, ptr %12, align 8, !tbaa !5
  br label %110

110:                                              ; preds = %108, %72
  %111 = load i64, ptr %14, align 8, !tbaa !5
  %112 = add nsw i64 %111, 1
  store i64 %112, ptr %14, align 8, !tbaa !5
  br label %59, !llvm.loop !15

113:                                              ; preds = %63
  %114 = load i64, ptr %13, align 8, !tbaa !5
  %115 = invoke i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %114)
          to label %116 unwind label %117

116:                                              ; preds = %113
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #6
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  br label %16, !llvm.loop !16

117:                                              ; preds = %113
  %118 = landingpad { ptr, i32 }
          cleanup
  %119 = extractvalue { ptr, i32 } %118, 0
  store ptr %119, ptr %6, align 8
  %120 = extractvalue { ptr, i32 } %118, 1
  store i32 %120, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #6
  br label %121

121:                                              ; preds = %117, %64, %45
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  br label %122

122:                                              ; preds = %121, %29
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  br label %125

123:                                              ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  %124 = load i32, ptr %1, align 4
  ret i32 %124

125:                                              ; preds = %122
  %126 = load ptr, ptr %6, align 8
  %127 = load i32, ptr %7, align 4
  %128 = insertvalue { ptr, i32 } poison, ptr %126, 0
  %129 = insertvalue { ptr, i32 } %128, i32 %127, 1
  resume { ptr, i32 } %129
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEPFbS3_S3_EEvT_SB_T0_(ptr, ptr, ptr noundef) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

attributes #0 = { 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 #1 = { 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 = { 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 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTSSt4pairIxxE", !6, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 0}
!14 = distinct !{!14, !10}
!15 = distinct !{!15, !10}
!16 = distinct !{!16, !10}


; 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" = 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::allocator" = type { i8 }

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z3cmpSt4pairIxxES0_(i64, i64, i64, i64) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca %"class.std::vector", align 8
  %4 = alloca %"class.std::allocator", align 1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #7
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not46 = icmp eq i64 %6, 0
  br i1 %.not46, label %._crit_edge49, label %.lr.ph48

.lr.ph48:                                         ; preds = %0, %._crit_edge44
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #7
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %3) #7
  %9 = load i64, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #7
  call void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  invoke void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %9, ptr noundef nonnull align 1 dereferenceable(1) %4)
          to label %10 unwind label %17

10:                                               ; preds = %.lr.ph48
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #7
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = icmp sgt i64 %11, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %10
  %13 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  %14 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEPFbS3_S3_EEvT_SB_T0_(ptr %13, ptr %14, ptr noundef nonnull @_Z3cmpSt4pairIxxES0_)
          to label %.preheader unwind label %29

.preheader:                                       ; preds = %._crit_edge
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = icmp sgt i64 %15, 0
  br i1 %16, label %.lr.ph43, label %._crit_edge44

17:                                               ; preds = %.lr.ph48
  %18 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #7
  br label %53

.lr.ph:                                           ; preds = %10, %.lr.ph
  %.03033 = phi i64 [ %23, %.lr.ph ], [ 0, %10 ]
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.03033) #7
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.03033) #7
  %21 = getelementptr inbounds i8, ptr %20, i64 8
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %19, ptr noundef nonnull %21)
  %23 = add nuw nsw i64 %.03033, 1
  %24 = load i64, ptr %2, align 8, !tbaa !5
  %25 = icmp slt i64 %23, %24
  br i1 %25, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge44:                                    ; preds = %49, %.preheader
  %.023.lcssa = phi i64 [ 0, %.preheader ], [ %.1, %49 ]
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.023.lcssa)
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #7
  %27 = load i64, ptr %1, align 8, !tbaa !5
  %28 = add nsw i64 %27, -1
  store i64 %28, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %27, 0
  br i1 %.not, label %._crit_edge49, label %.lr.ph48, !llvm.loop !11

29:                                               ; preds = %._crit_edge
  %30 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  br label %53

.lr.ph43:                                         ; preds = %.preheader, %49
  %31 = phi i64 [ %50, %49 ], [ %15, %.preheader ]
  %.042 = phi i64 [ %51, %49 ], [ 0, %.preheader ]
  %.02341 = phi i64 [ %.1, %49 ], [ 0, %.preheader ]
  %.02440 = phi i64 [ %.125, %49 ], [ 0, %.preheader ]
  %.02639 = phi i64 [ %.2, %49 ], [ 0, %.preheader ]
  %32 = icmp slt i64 %.042, %.02639
  br i1 %32, label %49, label %33

33:                                               ; preds = %.lr.ph43
  %34 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.042) #7
  %35 = getelementptr inbounds i8, ptr %34, i64 8
  %36 = load i64, ptr %35, align 8, !tbaa !12
  %37 = add nsw i64 %36, %.02341
  %38 = add nsw i64 %.02440, 1
  %39 = load i64, ptr %2, align 8, !tbaa !5
  %40 = icmp slt i64 %.02639, %39
  br i1 %40, label %.lr.ph36, label %.critedge

.lr.ph36:                                         ; preds = %33, %43
  %.12734 = phi i64 [ %44, %43 ], [ %.02639, %33 ]
  %41 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.12734) #7
  %42 = load i64, ptr %41, align 8, !tbaa !14
  %.not32 = icmp sgt i64 %42, %38
  %.pre.pre.pre = load i64, ptr %2, align 8, !tbaa !5
  br i1 %.not32, label %.critedge, label %43

43:                                               ; preds = %.lr.ph36
  %44 = add nsw i64 %.12734, 1
  %45 = icmp slt i64 %44, %.pre.pre.pre
  br i1 %45, label %.lr.ph36, label %.critedge, !llvm.loop !15

.critedge:                                        ; preds = %.lr.ph36, %43, %33
  %.pre = phi i64 [ %39, %33 ], [ %.pre.pre.pre, %43 ], [ %.pre.pre.pre, %.lr.ph36 ]
  %.127.lcssa = phi i64 [ %.02639, %33 ], [ %.12734, %.lr.ph36 ], [ %44, %43 ]
  %46 = sub nsw i64 %.042, %.127.lcssa
  %47 = call i64 @llvm.smax.i64(i64 %46, i64 -1)
  %48 = add nsw i64 %47, 1
  br label %49

49:                                               ; preds = %.lr.ph43, %.critedge
  %50 = phi i64 [ %31, %.lr.ph43 ], [ %.pre, %.critedge ]
  %.2 = phi i64 [ %.02639, %.lr.ph43 ], [ %.127.lcssa, %.critedge ]
  %.125 = phi i64 [ %.02440, %.lr.ph43 ], [ %48, %.critedge ]
  %.1 = phi i64 [ %.02341, %.lr.ph43 ], [ %37, %.critedge ]
  %51 = add nuw nsw i64 %.042, 1
  %52 = icmp slt i64 %51, %50
  br i1 %52, label %.lr.ph43, label %._crit_edge44, !llvm.loop !16

53:                                               ; preds = %29, %17
  %.pn = phi { ptr, i32 } [ %30, %29 ], [ %18, %17 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn

._crit_edge49:                                    ; preds = %._crit_edge44, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #7
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEPFbS3_S3_EEvT_SB_T0_(ptr, ptr, ptr noundef) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #6

attributes #0 = { 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 #1 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #4 = { 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 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"long long", !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}
!12 = !{!13, !6, i64 8}
!13 = !{!"_ZTSSt4pairIxxE", !6, i64 0, !6, i64 8}
!14 = !{!13, !6, i64 0}
!15 = distinct !{!15, !10}
!16 = distinct !{!16, !10}


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