; LLVM IR from DionysiosB/CodeForces :: 1500-1599 (1557A-EzzatAndTwoSubsequences)

; 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 [8 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca x86_fp80, align 16
  %5 = alloca x86_fp80, align 16
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca double, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %10

10:                                               ; preds = %41, %0
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = add nsw i64 %11, -1
  store i64 %12, ptr %2, align 8, !tbaa !5
  %13 = icmp ne i64 %11, 0
  br i1 %13, label %14, label %54

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #3
  store x86_fp80 0xK00000000000000000000, ptr %4, align 16, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #3
  store x86_fp80 0xKC023BA43B74000000000, ptr %5, align 16, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %38, %14
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = icmp slt i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %41

21:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %7)
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = sitofp i64 %23 to x86_fp80
  %25 = load x86_fp80, ptr %4, align 16, !tbaa !9
  %26 = fadd x86_fp80 %25, %24
  store x86_fp80 %26, ptr %4, align 16, !tbaa !9
  %27 = load x86_fp80, ptr %5, align 16, !tbaa !9
  %28 = load i64, ptr %7, align 8, !tbaa !5
  %29 = sitofp i64 %28 to x86_fp80
  %30 = fcmp ogt x86_fp80 %27, %29
  br i1 %30, label %31, label %33

31:                                               ; preds = %21
  %32 = load x86_fp80, ptr %5, align 16, !tbaa !9
  br label %36

33:                                               ; preds = %21
  %34 = load i64, ptr %7, align 8, !tbaa !5
  %35 = sitofp i64 %34 to x86_fp80
  br label %36

36:                                               ; preds = %33, %31
  %37 = phi x86_fp80 [ %32, %31 ], [ %35, %33 ]
  store x86_fp80 %37, ptr %5, align 16, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %38

38:                                               ; preds = %36
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = add nsw i64 %39, 1
  store i64 %40, ptr %6, align 8, !tbaa !5
  br label %16, !llvm.loop !11

41:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %42 = load x86_fp80, ptr %5, align 16, !tbaa !9
  %43 = load x86_fp80, ptr %4, align 16, !tbaa !9
  %44 = load x86_fp80, ptr %5, align 16, !tbaa !9
  %45 = fsub x86_fp80 %43, %44
  %46 = load i64, ptr %3, align 8, !tbaa !5
  %47 = sub nsw i64 %46, 1
  %48 = sitofp i64 %47 to x86_fp80
  %49 = fdiv x86_fp80 %45, %48
  %50 = fadd x86_fp80 %42, %49
  %51 = fptrunc x86_fp80 %50 to double
  store double %51, ptr %8, align 8, !tbaa !13
  %52 = load double, ptr %8, align 8, !tbaa !13
  %53 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, double noundef %52)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %10, !llvm.loop !15

54:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %55 = load i32, ptr %1, align 4
  ret i32 %55
}

; 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 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 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long double", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"double", !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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not17 = icmp eq i64 %5, 0
  br i1 %.not17, label %._crit_edge20, label %.lr.ph19

.lr.ph19:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph19
  %.010.lcssa = phi x86_fp80 [ 0xKC023BA43B74000000000, %.lr.ph19 ], [ %24, %.lr.ph ]
  %.0.lcssa = phi x86_fp80 [ 0xK00000000000000000000, %.lr.ph19 ], [ %22, %.lr.ph ]
  %.lcssa = phi i64 [ %8, %.lr.ph19 ], [ %26, %.lr.ph ]
  %10 = fsub x86_fp80 %.0.lcssa, %.010.lcssa
  %11 = add nsw i64 %.lcssa, -1
  %12 = sitofp i64 %11 to x86_fp80
  %13 = fdiv x86_fp80 %10, %12
  %14 = fadd x86_fp80 %.010.lcssa, %13
  %15 = fptrunc x86_fp80 %14 to double
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, double noundef %15)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %17 = load i64, ptr %1, align 8, !tbaa !5
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %17, 0
  br i1 %.not, label %._crit_edge20, label %.lr.ph19, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph19, %.lr.ph
  %.014 = phi x86_fp80 [ %22, %.lr.ph ], [ 0xK00000000000000000000, %.lr.ph19 ]
  %.0913 = phi i64 [ %25, %.lr.ph ], [ 0, %.lr.ph19 ]
  %.01012 = phi x86_fp80 [ %24, %.lr.ph ], [ 0xKC023BA43B74000000000, %.lr.ph19 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %20 = load i64, ptr %3, align 8
  %21 = sitofp i64 %20 to x86_fp80
  %22 = fadd x86_fp80 %.014, %21
  %23 = fcmp ogt x86_fp80 %.01012, %21
  %24 = select i1 %23, x86_fp80 %.01012, x86_fp80 %21
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  %25 = add nuw nsw i64 %.0913, 1
  %26 = load i64, ptr %2, align 8, !tbaa !5
  %27 = icmp slt i64 %25, %26
  br i1 %27, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge20:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  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: 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 = !{!"long", !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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass