; LLVM IR from DionysiosB/CodeForces :: 0300-0399 (381A-SerejaAndDima)

; 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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [9 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 i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca [2 x i64], align 16
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  store i32 0, ptr %2, align 4, !tbaa !5
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #7
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %11, i64 4)
  %13 = extractvalue { i64, i1 } %12, 1
  %14 = extractvalue { i64, i1 } %12, 0
  %15 = select i1 %13, i64 -1, i64 %14
  %16 = call noalias noundef nonnull ptr @_Znam(i64 noundef %15) #8
  store ptr %16, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #7
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %28, %0
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #7
  br label %31

22:                                               ; preds = %17
  %23 = load ptr, ptr %3, align 8, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i32, ptr %23, i64 %25
  %27 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %26)
  br label %28

28:                                               ; preds = %22
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %17, !llvm.loop !11

31:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #7
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  %32 = load i32, ptr %2, align 4, !tbaa !5
  %33 = sub nsw i32 %32, 1
  store i32 %33, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %7) #7
  call void @llvm.memset.p0.i64(ptr align 16 %7, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #7
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %80, %31
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = load i32, ptr %2, align 4, !tbaa !5
  %37 = icmp slt i32 %35, %36
  br i1 %37, label %39, label %38

38:                                               ; preds = %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #7
  br label %83

39:                                               ; preds = %34
  %40 = load ptr, ptr %3, align 8, !tbaa !9
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = load ptr, ptr %3, align 8, !tbaa !9
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %45, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = icmp slt i32 %44, %49
  br i1 %50, label %51, label %65

51:                                               ; preds = %39
  %52 = load ptr, ptr %3, align 8, !tbaa !9
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = add nsw i32 %53, -1
  store i32 %54, ptr %6, align 4, !tbaa !5
  %55 = sext i32 %53 to i64
  %56 = getelementptr inbounds i32, ptr %52, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = load i32, ptr %8, align 4, !tbaa !5
  %60 = srem i32 %59, 2
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds [2 x i64], ptr %7, i64 0, i64 %61
  %63 = load i64, ptr %62, align 8, !tbaa !13
  %64 = add nsw i64 %63, %58
  store i64 %64, ptr %62, align 8, !tbaa !13
  br label %79

65:                                               ; preds = %39
  %66 = load ptr, ptr %3, align 8, !tbaa !9
  %67 = load i32, ptr %5, align 4, !tbaa !5
  %68 = add nsw i32 %67, 1
  store i32 %68, ptr %5, align 4, !tbaa !5
  %69 = sext i32 %67 to i64
  %70 = getelementptr inbounds i32, ptr %66, i64 %69
  %71 = load i32, ptr %70, align 4, !tbaa !5
  %72 = sext i32 %71 to i64
  %73 = load i32, ptr %8, align 4, !tbaa !5
  %74 = srem i32 %73, 2
  %75 = sext i32 %74 to i64
  %76 = getelementptr inbounds [2 x i64], ptr %7, i64 0, i64 %75
  %77 = load i64, ptr %76, align 8, !tbaa !13
  %78 = add nsw i64 %77, %72
  store i64 %78, ptr %76, align 8, !tbaa !13
  br label %79

79:                                               ; preds = %65, %51
  br label %80

80:                                               ; preds = %79
  %81 = load i32, ptr %8, align 4, !tbaa !5
  %82 = add nsw i32 %81, 1
  store i32 %82, ptr %8, align 4, !tbaa !5
  br label %34, !llvm.loop !15

83:                                               ; preds = %38
  %84 = getelementptr inbounds [2 x i64], ptr %7, i64 0, i64 0
  %85 = load i64, ptr %84, align 16, !tbaa !13
  %86 = getelementptr inbounds [2 x i64], ptr %7, i64 0, i64 1
  %87 = load i64, ptr %86, align 8, !tbaa !13
  %88 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %85, i64 noundef %87)
  %89 = load ptr, ptr %3, align 8, !tbaa !9
  %90 = icmp eq ptr %89, null
  br i1 %90, label %92, label %91

91:                                               ; preds = %83
  call void @_ZdaPv(ptr noundef %89) #9
  br label %92

92:                                               ; preds = %91, %83
  call void @llvm.lifetime.end.p0(i64 16, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  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: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #5

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

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) #6

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #6 = { nobuiltin 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 = { builtin allocsize(0) }
attributes #9 = { builtin 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 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long", !7, i64 0}
!15 = distinct !{!15, !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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [9 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca [2 x i64], align 16
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  store i32 0, ptr %1, align 4, !tbaa !5
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = icmp slt i32 %4, 0
  %7 = shl nsw i64 %5, 2
  %8 = select i1 %6, i64 -1, i64 %7
  %9 = call noalias noundef nonnull ptr @_Znam(i64 noundef %8) #8
  %10 = icmp sgt i32 %4, 0
  br i1 %10, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #7
  br label %._crit_edge29

._crit_edge:                                      ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #7
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %2, i8 0, i64 16, i1 false)
  %11 = icmp sgt i32 %15, 0
  br i1 %11, label %.lr.ph28.preheader, label %._crit_edge29

.lr.ph28.preheader:                               ; preds = %._crit_edge
  %12 = add nsw i32 %15, -1
  br label %.lr.ph28

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %13 = getelementptr inbounds i32, ptr %9, i64 %indvars.iv
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %13)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = icmp slt i64 %indvars.iv.next, %16
  br i1 %17, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge29.loopexit:                           ; preds = %.lr.ph28
  %.pre = load i64, ptr %2, align 16, !tbaa !11
  %.phi.trans.insert = getelementptr inbounds i8, ptr %2, i64 8
  %.pre32 = load i64, ptr %.phi.trans.insert, align 8, !tbaa !11
  br label %._crit_edge29

._crit_edge29:                                    ; preds = %._crit_edge.thread, %._crit_edge29.loopexit, %._crit_edge
  %18 = phi i64 [ %.pre32, %._crit_edge29.loopexit ], [ 0, %._crit_edge ], [ 0, %._crit_edge.thread ]
  %19 = phi i64 [ %.pre, %._crit_edge29.loopexit ], [ 0, %._crit_edge ], [ 0, %._crit_edge.thread ]
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %19, i64 noundef %18)
  call void @_ZdaPv(ptr noundef nonnull %9) #9
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  ret i32 0

.lr.ph28:                                         ; preds = %.lr.ph28.preheader, %.lr.ph28
  %.026 = phi i32 [ %36, %.lr.ph28 ], [ 0, %.lr.ph28.preheader ]
  %.01625 = phi i32 [ %.1, %.lr.ph28 ], [ %12, %.lr.ph28.preheader ]
  %.01724 = phi i32 [ %.118, %.lr.ph28 ], [ 0, %.lr.ph28.preheader ]
  %21 = zext nneg i32 %.01724 to i64
  %22 = getelementptr inbounds i32, ptr %9, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %.01625 to i64
  %25 = getelementptr inbounds i32, ptr %9, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = icmp sge i32 %23, %26
  %28 = and i32 %.026, 1
  %29 = zext nneg i32 %28 to i64
  %30 = getelementptr inbounds [2 x i64], ptr %2, i64 0, i64 %29
  %31 = load i64, ptr %30, align 8, !tbaa !11
  %.sink = call i32 @llvm.smax.i32(i32 %23, i32 %26)
  %32 = zext i1 %27 to i32
  %.118 = add nuw nsw i32 %.01724, %32
  %not. = xor i1 %27, true
  %33 = sext i1 %not. to i32
  %.1 = add nsw i32 %.01625, %33
  %34 = sext i32 %.sink to i64
  %35 = add nsw i64 %31, %34
  store i64 %35, ptr %30, align 8, !tbaa !11
  %36 = add nuw nsw i32 %.026, 1
  %exitcond.not = icmp eq i32 %36, %15
  br i1 %exitcond.not, label %._crit_edge29.loopexit, label %.lr.ph28, !llvm.loop !13
}

; 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: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) local_unnamed_addr #5

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #6

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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { nobuiltin 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 #6 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #7 = { nounwind }
attributes #8 = { builtin allocsize(0) }
attributes #9 = { builtin 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"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !10}


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