; LLVM IR from seikhchilli/codeforces-solution :: 1368A (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::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" }

@_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
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %8 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %9 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %10 = getelementptr i8, ptr %9, i64 -24
  %11 = load i64, ptr %10, align 8
  %12 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %11
  %13 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %12, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %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)
  br label %15

15:                                               ; preds = %72, %0
  %16 = load i32, ptr %2, align 4, !tbaa !8
  %17 = add nsw i32 %16, -1
  store i32 %17, ptr %2, align 4, !tbaa !8
  %18 = icmp ne i32 %16, 0
  br i1 %18, label %19, label %76

19:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %21 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %20, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %22 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %21, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %23 = load i32, ptr %4, align 4, !tbaa !8
  %24 = load i32, ptr %3, align 4, !tbaa !8
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %26, label %30

26:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  %27 = load i32, ptr %3, align 4, !tbaa !8
  store i32 %27, ptr %6, align 4, !tbaa !8
  %28 = load i32, ptr %4, align 4, !tbaa !8
  store i32 %28, ptr %3, align 4, !tbaa !8
  %29 = load i32, ptr %6, align 4, !tbaa !8
  store i32 %29, ptr %4, align 4, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %30

30:                                               ; preds = %26, %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !8
  br label %31

31:                                               ; preds = %71, %30
  %32 = load i32, ptr %3, align 4, !tbaa !8
  %33 = load i32, ptr %5, align 4, !tbaa !8
  %34 = icmp sle i32 %32, %33
  br i1 %34, label %35, label %39

35:                                               ; preds = %31
  %36 = load i32, ptr %4, align 4, !tbaa !8
  %37 = load i32, ptr %5, align 4, !tbaa !8
  %38 = icmp sle i32 %36, %37
  br label %39

39:                                               ; preds = %35, %31
  %40 = phi i1 [ false, %31 ], [ %38, %35 ]
  br i1 %40, label %41, label %72

41:                                               ; preds = %39
  %42 = load i32, ptr %3, align 4, !tbaa !8
  %43 = load i32, ptr %5, align 4, !tbaa !8
  %44 = icmp sle i32 %42, %43
  br i1 %44, label %45, label %51

45:                                               ; preds = %41
  %46 = load i32, ptr %4, align 4, !tbaa !8
  %47 = load i32, ptr %3, align 4, !tbaa !8
  %48 = add nsw i32 %47, %46
  store i32 %48, ptr %3, align 4, !tbaa !8
  %49 = load i32, ptr %7, align 4, !tbaa !8
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %7, align 4, !tbaa !8
  br label %51

51:                                               ; preds = %45, %41
  %52 = load i32, ptr %3, align 4, !tbaa !8
  %53 = load i32, ptr %5, align 4, !tbaa !8
  %54 = icmp sgt i32 %52, %53
  br i1 %54, label %55, label %56

55:                                               ; preds = %51
  br label %72

56:                                               ; preds = %51
  %57 = load i32, ptr %4, align 4, !tbaa !8
  %58 = load i32, ptr %5, align 4, !tbaa !8
  %59 = icmp sle i32 %57, %58
  br i1 %59, label %60, label %66

60:                                               ; preds = %56
  %61 = load i32, ptr %3, align 4, !tbaa !8
  %62 = load i32, ptr %4, align 4, !tbaa !8
  %63 = add nsw i32 %62, %61
  store i32 %63, ptr %4, align 4, !tbaa !8
  %64 = load i32, ptr %7, align 4, !tbaa !8
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %7, align 4, !tbaa !8
  br label %66

66:                                               ; preds = %60, %56
  %67 = load i32, ptr %4, align 4, !tbaa !8
  %68 = load i32, ptr %5, align 4, !tbaa !8
  %69 = icmp sgt i32 %67, %68
  br i1 %69, label %70, label %71

70:                                               ; preds = %66
  br label %72

71:                                               ; preds = %66
  br label %31, !llvm.loop !11

72:                                               ; preds = %70, %55, %39
  %73 = load i32, ptr %7, align 4, !tbaa !8
  %74 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %73)
  %75 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %74, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %15, !llvm.loop !13

76:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %77 = load i32, ptr %1, align 4
  ret i32 %77
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #1

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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !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" }

@_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 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %6 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %7 = getelementptr i8, ptr %6, i64 -24
  %8 = load i64, ptr %7, align 8
  %9 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %8
  %10 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %9, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %11 = 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)
  %12 = load i32, ptr %1, align 4, !tbaa !8
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %1, align 4, !tbaa !8
  %.not18 = icmp eq i32 %12, 0
  br i1 %.not18, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.split.loop.exit
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  %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 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %14, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %15, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %17 = load i32, ptr %3, align 4
  %18 = load i32, ptr %2, align 4, !tbaa !8
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %.lr.ph
  store i32 %17, ptr %2, align 4, !tbaa !8
  store i32 %18, ptr %3, align 4, !tbaa !8
  br label %21

21:                                               ; preds = %20, %.lr.ph
  %.promoted17 = phi i32 [ %18, %20 ], [ %17, %.lr.ph ]
  %.promoted = phi i32 [ %17, %20 ], [ %18, %.lr.ph ]
  %22 = load i32, ptr %4, align 4
  br label %23

23:                                               ; preds = %32, %21
  %24 = phi i32 [ %.promoted17, %21 ], [ %33, %32 ]
  %25 = phi i32 [ %.promoted, %21 ], [ %30, %32 ]
  %.0 = phi i32 [ 0, %21 ], [ %34, %32 ]
  %26 = icmp sle i32 %25, %22
  %27 = icmp sle i32 %24, %22
  %28 = and i1 %26, %27
  br i1 %28, label %29, label %.split.loop.exit

29:                                               ; preds = %23
  %30 = add nsw i32 %24, %25
  store i32 %30, ptr %2, align 4, !tbaa !8
  %31 = icmp sgt i32 %30, %22
  br i1 %31, label %.split.loop.exit13, label %32

32:                                               ; preds = %29
  %33 = add nsw i32 %30, %24
  store i32 %33, ptr %3, align 4, !tbaa !8
  %34 = add nuw nsw i32 %.0, 2
  %35 = icmp sgt i32 %33, %22
  br i1 %35, label %.split.loop.exit, label %23, !llvm.loop !11

.split.loop.exit13:                               ; preds = %29
  %36 = or disjoint i32 %.0, 1
  br label %.split.loop.exit

.split.loop.exit:                                 ; preds = %23, %32, %.split.loop.exit13
  %.3 = phi i32 [ %36, %.split.loop.exit13 ], [ %34, %32 ], [ %.0, %23 ]
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.3)
  %38 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) %37, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %39 = load i32, ptr %1, align 4, !tbaa !8
  %40 = add nsw i32 %39, -1
  store i32 %40, ptr %1, align 4, !tbaa !8
  %.not = icmp eq i32 %39, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.split.loop.exit, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

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 #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) local_unnamed_addr #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1

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 = { "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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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