; LLVM IR from tangjz/acm-icpc :: codeforces/complete (158B)

; 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" }

@n = external dso_local global i32, align 4
@cnt = external dso_local global [5 x i32], align 16
@ans = external dso_local global i32, align 4
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  %7 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  br label %9

9:                                                ; preds = %13, %0
  %10 = load i32, ptr @n, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr @n, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %20

13:                                               ; preds = %9
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [5 x i32], ptr @cnt, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %17, align 4, !tbaa !5
  br label %9, !llvm.loop !9

20:                                               ; preds = %9
  %21 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 4), align 16, !tbaa !5
  store i32 %21, ptr @ans, align 4, !tbaa !5
  %22 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 3), align 4, !tbaa !5
  %23 = load i32, ptr @ans, align 4, !tbaa !5
  %24 = add nsw i32 %23, %22
  store i32 %24, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  %25 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  %26 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 3), align 4, !tbaa !5
  %27 = sub nsw i32 %25, %26
  store i32 %27, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #6
  store i32 0, ptr %4, align 4, !tbaa !5
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  %30 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 2), align 8, !tbaa !5
  %31 = ashr i32 %30, 1
  %32 = load i32, ptr @ans, align 4, !tbaa !5
  %33 = add nsw i32 %32, %31
  store i32 %33, ptr @ans, align 4, !tbaa !5
  %34 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 2), align 8, !tbaa !5
  %35 = and i32 %34, 1
  %36 = icmp ne i32 %35, 0
  br i1 %36, label %37, label %44

37:                                               ; preds = %20
  %38 = load i32, ptr @ans, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  %40 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  %41 = sub nsw i32 %40, 2
  store i32 %41, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  store i32 0, ptr %6, align 4, !tbaa !5
  %42 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %43 = load i32, ptr %42, align 4, !tbaa !5
  store i32 %43, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  br label %44

44:                                               ; preds = %37, %20
  %45 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  %46 = sdiv i32 %45, 4
  %47 = load i32, ptr getelementptr inbounds ([5 x i32], ptr @cnt, i64 0, i64 1), align 4, !tbaa !5
  %48 = srem i32 %47, 4
  %49 = icmp eq i32 %48, 0
  %50 = xor i1 %49, true
  %51 = zext i1 %50 to i32
  %52 = add nsw i32 %46, %51
  %53 = load i32, ptr @ans, align 4, !tbaa !5
  %54 = add nsw i32 %53, %52
  store i32 %54, ptr @ans, align 4, !tbaa !5
  %55 = load i32, ptr @ans, align 4, !tbaa !5
  %56 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %55)
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %56, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  ret i32 0
}

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

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

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

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #4 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 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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::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" }

@n = external dso_local global i32, align 4
@cnt = external dso_local local_unnamed_addr global [5 x i32], align 16
@ans = external dso_local local_unnamed_addr global i32, align 4
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  %6 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %7 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  %8 = load i32, ptr @n, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr @n, align 4, !tbaa !5
  %.not2 = icmp eq i32 %8, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [5 x i32], ptr @cnt, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %13, align 4, !tbaa !5
  %16 = load i32, ptr @n, align 4, !tbaa !5
  %17 = add nsw i32 %16, -1
  store i32 %17, ptr @n, align 4, !tbaa !5
  %.not = icmp eq i32 %16, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %18 = load i32, ptr getelementptr inbounds (i8, ptr @cnt, i64 16), align 16, !tbaa !5
  %19 = load i32, ptr getelementptr inbounds (i8, ptr @cnt, i64 12), align 4, !tbaa !5
  %20 = add nsw i32 %19, %18
  store i32 %20, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  %21 = load i32, ptr getelementptr inbounds (i8, ptr @cnt, i64 4), align 4, !tbaa !5
  %22 = sub nsw i32 %21, %19
  store i32 %22, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #6
  store i32 0, ptr %3, align 4, !tbaa !5
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %24 = load i32, ptr %23, align 4, !tbaa !5
  store i32 %24, ptr getelementptr inbounds (i8, ptr @cnt, i64 4), align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  %25 = load i32, ptr getelementptr inbounds (i8, ptr @cnt, i64 8), align 8, !tbaa !5
  %26 = ashr i32 %25, 1
  %27 = load i32, ptr @ans, align 4, !tbaa !5
  %28 = add nsw i32 %27, %26
  %29 = and i32 %25, 1
  %.not1 = icmp eq i32 %29, 0
  br i1 %.not1, label %35, label %30

30:                                               ; preds = %._crit_edge
  %31 = add nsw i32 %28, 1
  store i32 %31, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #6
  %32 = add nsw i32 %24, -2
  store i32 %32, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #6
  store i32 0, ptr %5, align 4, !tbaa !5
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %34 = load i32, ptr %33, align 4, !tbaa !5
  store i32 %34, ptr getelementptr inbounds (i8, ptr @cnt, i64 4), align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #6
  %.pre = load i32, ptr @ans, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %30, %._crit_edge
  %36 = phi i32 [ %.pre, %30 ], [ %28, %._crit_edge ]
  %37 = phi i32 [ %34, %30 ], [ %24, %._crit_edge ]
  %38 = sdiv i32 %37, 4
  %39 = and i32 %37, 3
  %40 = icmp ne i32 %39, 0
  %41 = zext i1 %40 to i32
  %42 = add i32 %36, %38
  %43 = add i32 %42, %41
  store i32 %43, ptr @ans, align 4, !tbaa !5
  %44 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %43)
  %45 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %44, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #6
  ret i32 0
}

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

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

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

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #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 #4 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 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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