; LLVM IR from tangjz/acm-icpc :: codeforces/complete (1367B)

; 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
@_ZZ4mainE3arr = external hidden global [500001 x i32], align 16
@.str.1 = external hidden unnamed_addr constant [4 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 i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca [2 x i32], align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %58, %0
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %61

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  call void @llvm.memset.p0.i64(ptr align 4 %6, i8 0, i64 8, i1 false)
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %42, %14
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %45

21:                                               ; preds = %16
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr @_ZZ4mainE3arr, i64 %23
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %24)
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [500001 x i32], ptr @_ZZ4mainE3arr, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = sub nsw i32 %29, %30
  %32 = and i32 %31, 1
  %33 = icmp ne i32 %32, 0
  br i1 %33, label %34, label %41

34:                                               ; preds = %21
  %35 = load i32, ptr %7, align 4, !tbaa !5
  %36 = and i32 %35, 1
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [2 x i32], ptr %6, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %38, align 4, !tbaa !5
  br label %41

41:                                               ; preds = %34, %21
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %7, align 4, !tbaa !5
  br label %16, !llvm.loop !9

45:                                               ; preds = %20
  %46 = getelementptr inbounds [2 x i32], ptr %6, i64 0, i64 0
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = getelementptr inbounds [2 x i32], ptr %6, i64 0, i64 1
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = icmp ne i32 %47, %49
  br i1 %50, label %51, label %52

51:                                               ; preds = %45
  br label %55

52:                                               ; preds = %45
  %53 = getelementptr inbounds [2 x i32], ptr %6, i64 0, i64 0
  %54 = load i32, ptr %53, align 4, !tbaa !5
  br label %55

55:                                               ; preds = %52, %51
  %56 = phi i32 [ -1, %51 ], [ %54, %52 ]
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %56)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %58

58:                                               ; preds = %55
  %59 = load i32, ptr %3, align 4, !tbaa !5
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %3, align 4, !tbaa !5
  br label %9, !llvm.loop !11

61:                                               ; preds = %13
  store i32 0, ptr %1, align 4
  store i32 1, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %62 = load i32, ptr %1, align 4
  ret i32 %62
}

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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

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 nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = distinct !{!11, !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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@_ZZ4mainE3arr = external hidden global [500001 x i32], align 16
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca [2 x i32], align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  store i32 1, ptr %1, align 4, !tbaa !5
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %.not13 = icmp slt i32 %5, 1
  br i1 %.not13, label %._crit_edge17, label %.lr.ph16

.lr.ph16:                                         ; preds = %0
  %6 = getelementptr inbounds i8, ptr %3, i64 4
  br label %7

._crit_edge17:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0

7:                                                ; preds = %.lr.ph16, %._crit_edge
  %.0914 = phi i32 [ 1, %.lr.ph16 ], [ %15, %._crit_edge ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 0, ptr %3, align 8
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

._crit_edge.loopexit:                             ; preds = %28
  %.pre = load i32, ptr %3, align 8
  %.pre19 = load i32, ptr %6, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %7
  %11 = phi i32 [ %.pre19, %._crit_edge.loopexit ], [ 0, %7 ]
  %12 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ 0, %7 ]
  %.not10 = icmp eq i32 %12, %11
  %13 = select i1 %.not10, i32 %12, i32 -1
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %13)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  %15 = add nuw nsw i32 %.0914, 1
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %.not.not = icmp slt i32 %.0914, %16
  br i1 %.not.not, label %7, label %._crit_edge17, !llvm.loop !9

.lr.ph:                                           ; preds = %7, %28
  %indvars.iv = phi i64 [ %indvars.iv.next, %28 ], [ 0, %7 ]
  %17 = getelementptr inbounds i32, ptr @_ZZ4mainE3arr, i64 %indvars.iv
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %17)
  %19 = load i32, ptr %17, align 4, !tbaa !5
  %20 = trunc nuw nsw i64 %indvars.iv to i32
  %21 = sub nsw i32 %19, %20
  %22 = and i32 %21, 1
  %.not11 = icmp eq i32 %22, 0
  br i1 %.not11, label %28, label %23

23:                                               ; preds = %.lr.ph
  %24 = and i64 %indvars.iv, 1
  %25 = getelementptr inbounds [2 x i32], ptr %3, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %25, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %.lr.ph, %23
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = icmp slt i64 %indvars.iv.next, %30
  br i1 %31, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !11
}

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

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

attributes #0 = { mustprogress nofree norecurse 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 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 = { 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 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass