; LLVM IR from tangjz/acm-icpc :: codeforces/complete (297A)

; 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"

@cnt1 = external dso_local global i32, align 4
@cnt2 = external dso_local global i32, align 4
@a = external dso_local global [10001 x i8], align 16
@b = external dso_local global [10001 x i8], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = 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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @a, ptr noundef @b)
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %22, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [10001 x i8], ptr @a, i64 0, i64 %6
  %8 = load i8, ptr %7, align 1, !tbaa !9
  %9 = sext i8 %8 to i32
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %11, label %25

11:                                               ; preds = %4
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [10001 x i8], ptr @a, i64 0, i64 %13
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = sext i8 %15 to i32
  %17 = icmp eq i32 %16, 49
  br i1 %17, label %18, label %21

18:                                               ; preds = %11
  %19 = load i32, ptr @cnt1, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr @cnt1, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %18, %11
  br label %22

22:                                               ; preds = %21
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !10

25:                                               ; preds = %4
  %26 = load i32, ptr @cnt1, align 4, !tbaa !5
  %27 = and i32 %26, 1
  %28 = icmp ne i32 %27, 0
  br i1 %28, label %29, label %32

29:                                               ; preds = %25
  %30 = load i32, ptr @cnt1, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr @cnt1, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %29, %25
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %51, %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10001 x i8], ptr @b, i64 0, i64 %35
  %37 = load i8, ptr %36, align 1, !tbaa !9
  %38 = sext i8 %37 to i32
  %39 = icmp ne i32 %38, 0
  br i1 %39, label %40, label %54

40:                                               ; preds = %33
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [10001 x i8], ptr @b, i64 0, i64 %42
  %44 = load i8, ptr %43, align 1, !tbaa !9
  %45 = sext i8 %44 to i32
  %46 = icmp eq i32 %45, 49
  br i1 %46, label %47, label %50

47:                                               ; preds = %40
  %48 = load i32, ptr @cnt2, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr @cnt2, align 4, !tbaa !5
  br label %50

50:                                               ; preds = %47, %40
  br label %51

51:                                               ; preds = %50
  %52 = load i32, ptr %2, align 4, !tbaa !5
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %2, align 4, !tbaa !5
  br label %33, !llvm.loop !12

54:                                               ; preds = %33
  %55 = load i32, ptr @cnt1, align 4, !tbaa !5
  %56 = load i32, ptr @cnt2, align 4, !tbaa !5
  %57 = icmp sge i32 %55, %56
  br i1 %57, label %58, label %60

58:                                               ; preds = %54
  %59 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %62

60:                                               ; preds = %54
  %61 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %62

62:                                               ; preds = %60, %58
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  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

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { 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 = { 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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; 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"

@cnt1 = external dso_local local_unnamed_addr global i32, align 4
@cnt2 = external dso_local local_unnamed_addr global i32, align 4
@a = external dso_local global [10001 x i8], align 16
@b = external dso_local global [10001 x i8], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = 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 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @a, ptr noundef nonnull @b)
  %cnt1.promoted = load i32, ptr @cnt1, align 4, !tbaa !5
  br label %2

2:                                                ; preds = %8, %0
  %indvars.iv = phi i64 [ %indvars.iv.next, %8 ], [ 0, %0 ]
  %3 = phi i32 [ %9, %8 ], [ %cnt1.promoted, %0 ]
  %4 = getelementptr inbounds [10001 x i8], ptr @a, i64 0, i64 %indvars.iv
  %5 = load i8, ptr %4, align 1, !tbaa !9
  switch i8 %5, label %8 [
    i8 0, label %10
    i8 49, label %6
  ]

6:                                                ; preds = %2
  %7 = add nsw i32 %3, 1
  store i32 %7, ptr @cnt1, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %2, %6
  %9 = phi i32 [ %3, %2 ], [ %7, %6 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  br label %2, !llvm.loop !10

10:                                               ; preds = %2
  %11 = and i32 %3, 1
  %.not8 = icmp eq i32 %11, 0
  br i1 %.not8, label %14, label %12

12:                                               ; preds = %10
  %13 = add nsw i32 %3, 1
  store i32 %13, ptr @cnt1, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %12, %10
  %15 = phi i32 [ %13, %12 ], [ %3, %10 ]
  %cnt2.promoted = load i32, ptr @cnt2, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %22, %14
  %indvars.iv12 = phi i64 [ %indvars.iv.next13, %22 ], [ 0, %14 ]
  %17 = phi i32 [ %23, %22 ], [ %cnt2.promoted, %14 ]
  %18 = getelementptr inbounds [10001 x i8], ptr @b, i64 0, i64 %indvars.iv12
  %19 = load i8, ptr %18, align 1, !tbaa !9
  switch i8 %19, label %22 [
    i8 0, label %24
    i8 49, label %20
  ]

20:                                               ; preds = %16
  %21 = add nsw i32 %17, 1
  store i32 %21, ptr @cnt2, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %16, %20
  %23 = phi i32 [ %17, %16 ], [ %21, %20 ]
  %indvars.iv.next13 = add nuw nsw i64 %indvars.iv12, 1
  br label %16, !llvm.loop !12

24:                                               ; preds = %16
  %.not10 = icmp slt i32 %15, %17
  %.str.2..str.1 = select i1 %.not10, ptr @.str.2, ptr @.str.1
  %25 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.2..str.1)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

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 = { 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" }

!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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass