; LLVM IR from DionysiosB/CodeForces :: 0100-0199 (160A-Twins)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %10, i64 4)
  %12 = extractvalue { i64, i1 } %11, 1
  %13 = extractvalue { i64, i1 } %11, 0
  %14 = select i1 %12, i64 -1, i64 %13
  %15 = call noalias noundef nonnull ptr @_Znam(i64 noundef %14) #7
  store ptr %15, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  store i64 0, ptr %4, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  store i64 0, ptr %5, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  store i64 0, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %35, %0
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  br label %38

21:                                               ; preds = %16
  %22 = load ptr, ptr %3, align 8, !tbaa !9
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %25)
  %27 = load ptr, ptr %3, align 8, !tbaa !9
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i32, ptr %27, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = load i64, ptr %4, align 8, !tbaa !11
  %34 = add nsw i64 %33, %32
  store i64 %34, ptr %4, align 8, !tbaa !11
  br label %35

35:                                               ; preds = %21
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %7, align 4, !tbaa !5
  br label %16, !llvm.loop !13

38:                                               ; preds = %20
  %39 = load ptr, ptr %3, align 8, !tbaa !9
  %40 = load ptr, ptr %3, align 8, !tbaa !9
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef %39, ptr noundef %43)
  br label %44

44:                                               ; preds = %49, %38
  %45 = load i64, ptr %6, align 8, !tbaa !11
  %46 = load i64, ptr %4, align 8, !tbaa !11
  %47 = sdiv i64 %46, 2
  %48 = icmp sle i64 %45, %47
  br i1 %48, label %49, label %62

49:                                               ; preds = %44
  %50 = load i64, ptr %5, align 8, !tbaa !11
  %51 = add nsw i64 %50, 1
  store i64 %51, ptr %5, align 8, !tbaa !11
  %52 = load ptr, ptr %3, align 8, !tbaa !9
  %53 = load i32, ptr %2, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = load i64, ptr %5, align 8, !tbaa !11
  %56 = sub nsw i64 %54, %55
  %57 = getelementptr inbounds i32, ptr %52, i64 %56
  %58 = load i32, ptr %57, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = load i64, ptr %6, align 8, !tbaa !11
  %61 = add nsw i64 %60, %59
  store i64 %61, ptr %6, align 8, !tbaa !11
  br label %44, !llvm.loop !15

62:                                               ; preds = %44
  %63 = load i64, ptr %5, align 8, !tbaa !11
  %64 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %63)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  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 i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #3

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #4

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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) #5

declare i32 @printf(ptr noundef, ...) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nobuiltin allocsize(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 }
attributes #7 = { builtin allocsize(0) }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = icmp slt i32 %3, 0
  %6 = shl nsw i64 %4, 2
  %7 = select i1 %5, i64 -1, i64 %6
  %8 = call noalias noundef nonnull ptr @_Znam(i64 noundef %7) #6
  %9 = icmp sgt i32 %3, 0
  br i1 %9, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %0
  %10 = getelementptr inbounds i32, ptr %8, i64 %4
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef nonnull %8, ptr noundef nonnull %10)
  br label %.lr.ph26

._crit_edge:                                      ; preds = %.lr.ph
  %11 = getelementptr inbounds i32, ptr %8, i64 %22
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef nonnull %8, ptr noundef nonnull %11)
  %12 = sdiv i64 %20, 2
  %.not22 = icmp slt i64 %20, -1
  br i1 %.not22, label %._crit_edge27, label %.lr.ph26

.lr.ph26:                                         ; preds = %._crit_edge.thread, %._crit_edge
  %13 = phi i64 [ 0, %._crit_edge.thread ], [ %12, %._crit_edge ]
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  br label %24

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %.01719 = phi i64 [ %20, %.lr.ph ], [ 0, %0 ]
  %16 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %16)
  %18 = load i32, ptr %16, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = add nsw i64 %.01719, %19
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = icmp slt i64 %indvars.iv.next, %22
  br i1 %23, label %.lr.ph, label %._crit_edge, !llvm.loop !9

24:                                               ; preds = %.lr.ph26, %24
  %.01524 = phi i64 [ 0, %.lr.ph26 ], [ %30, %24 ]
  %.01623 = phi i64 [ 0, %.lr.ph26 ], [ %25, %24 ]
  %25 = add nuw nsw i64 %.01623, 1
  %26 = sub nsw i64 %15, %25
  %27 = getelementptr inbounds i32, ptr %8, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = add nsw i64 %.01524, %29
  %.not = icmp sgt i64 %30, %13
  br i1 %.not, label %._crit_edge27, label %24, !llvm.loop !11

._crit_edge27:                                    ; preds = %24, %._crit_edge
  %.016.lcssa = phi i64 [ 0, %._crit_edge ], [ %25, %24 ]
  %31 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.016.lcssa)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) 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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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 = { 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 #3 = { nobuiltin allocsize(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 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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