; LLVM IR from Izaron/ACM-ICPC :: Russian Council of School Olympiads (R.S.O.Sh.)/IOIP/IOIP 2016 (path)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@.str = external hidden unnamed_addr constant [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@stdin = external global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@stdout = external global ptr, align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; 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 i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  %10 = load ptr, ptr @stdin, align 8, !tbaa !5
  %11 = call ptr @freopen(ptr noundef @.str, ptr noundef @.str.1, ptr noundef %10)
  %12 = load ptr, ptr @stdout, align 8, !tbaa !5
  %13 = call ptr @freopen(ptr noundef @.str.2, ptr noundef @.str.3, ptr noundef %12)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %14, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %4)
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %16, ptr noundef nonnull align 8 dereferenceable(8) %5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %18 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %18, ptr %6, align 8, !tbaa !9
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %5)
  %20 = load i64, ptr %19, align 8, !tbaa !9
  store i64 %20, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %21 = load i64, ptr %2, align 8, !tbaa !9
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = sub nsw i64 %21, %22
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %7, align 8, !tbaa !9
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7)
  %26 = load i64, ptr %25, align 8, !tbaa !9
  store i64 %26, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %27 = load i64, ptr %3, align 8, !tbaa !9
  %28 = load i64, ptr %5, align 8, !tbaa !9
  %29 = sub nsw i64 %27, %28
  %30 = add nsw i64 %29, 1
  store i64 %30, ptr %8, align 8, !tbaa !9
  %31 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %8)
  %32 = load i64, ptr %31, align 8, !tbaa !9
  store i64 %32, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %33 = load i64, ptr %6, align 8, !tbaa !9
  %34 = mul nsw i64 2, %33
  %35 = sub nsw i64 %34, 1
  %36 = load i64, ptr %6, align 8, !tbaa !9
  %37 = mul nsw i64 2, %36
  %38 = sub nsw i64 %37, 1
  %39 = mul nsw i64 %35, %38
  store i64 %39, ptr %9, align 8, !tbaa !9
  %40 = load i64, ptr %4, align 8, !tbaa !9
  %41 = load i64, ptr %6, align 8, !tbaa !9
  %42 = add nsw i64 %40, %41
  %43 = load i64, ptr %2, align 8, !tbaa !9
  %44 = icmp sle i64 %42, %43
  br i1 %44, label %45, label %82

45:                                               ; preds = %0
  %46 = load i64, ptr %6, align 8, !tbaa !9
  %47 = mul nsw i64 2, %46
  %48 = sub nsw i64 %47, 1
  %49 = load i64, ptr %9, align 8, !tbaa !9
  %50 = add nsw i64 %49, %48
  store i64 %50, ptr %9, align 8, !tbaa !9
  %51 = load i64, ptr %5, align 8, !tbaa !9
  %52 = load i64, ptr %6, align 8, !tbaa !9
  %53 = sub nsw i64 %51, %52
  %54 = icmp sgt i64 %53, 0
  br i1 %54, label %55, label %81

55:                                               ; preds = %45
  %56 = load i64, ptr %6, align 8, !tbaa !9
  %57 = mul nsw i64 2, %56
  %58 = load i64, ptr %9, align 8, !tbaa !9
  %59 = add nsw i64 %58, %57
  store i64 %59, ptr %9, align 8, !tbaa !9
  %60 = load i64, ptr %4, align 8, !tbaa !9
  %61 = load i64, ptr %6, align 8, !tbaa !9
  %62 = sub nsw i64 %60, %61
  %63 = icmp sgt i64 %62, 0
  br i1 %63, label %64, label %80

64:                                               ; preds = %55
  %65 = load i64, ptr %6, align 8, !tbaa !9
  %66 = mul nsw i64 2, %65
  %67 = load i64, ptr %9, align 8, !tbaa !9
  %68 = add nsw i64 %67, %66
  store i64 %68, ptr %9, align 8, !tbaa !9
  %69 = load i64, ptr %5, align 8, !tbaa !9
  %70 = load i64, ptr %6, align 8, !tbaa !9
  %71 = add nsw i64 %69, %70
  %72 = load i64, ptr %3, align 8, !tbaa !9
  %73 = icmp sle i64 %71, %72
  br i1 %73, label %74, label %79

74:                                               ; preds = %64
  %75 = load i64, ptr %6, align 8, !tbaa !9
  %76 = mul nsw i64 2, %75
  %77 = load i64, ptr %9, align 8, !tbaa !9
  %78 = add nsw i64 %77, %76
  store i64 %78, ptr %9, align 8, !tbaa !9
  br label %79

79:                                               ; preds = %74, %64
  br label %80

80:                                               ; preds = %79, %55
  br label %81

81:                                               ; preds = %80, %45
  br label %82

82:                                               ; preds = %81, %0
  %83 = load i64, ptr %9, align 8, !tbaa !9
  %84 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %83)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  %85 = load i32, ptr %1, align 4
  ret i32 %85
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #3 align 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 = { "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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@.str = external hidden unnamed_addr constant [8 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@stdout = external local_unnamed_addr global ptr, align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse 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
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = load ptr, ptr @stdin, align 8, !tbaa !5
  %9 = tail call ptr @freopen(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, ptr noundef %8)
  %10 = load ptr, ptr @stdout, align 8, !tbaa !5
  %11 = tail call ptr @freopen(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.3, ptr noundef %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  %12 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %12, ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) %14, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #5
  %16 = load i64, ptr %3, align 8, !tbaa !9
  store i64 %16, ptr %5, align 8, !tbaa !9
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %4)
  %18 = load i64, ptr %17, align 8, !tbaa !9
  store i64 %18, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #5
  %19 = load i64, ptr %1, align 8, !tbaa !9
  %20 = load i64, ptr %3, align 8, !tbaa !9
  %21 = add i64 %19, 1
  %22 = sub i64 %21, %20
  store i64 %22, ptr %6, align 8, !tbaa !9
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6)
  %24 = load i64, ptr %23, align 8, !tbaa !9
  store i64 %24, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #5
  %25 = load i64, ptr %2, align 8, !tbaa !9
  %26 = load i64, ptr %4, align 8, !tbaa !9
  %27 = add i64 %25, 1
  %28 = sub i64 %27, %26
  store i64 %28, ptr %7, align 8, !tbaa !9
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %7)
  %30 = load i64, ptr %29, align 8, !tbaa !9
  store i64 %30, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #5
  %31 = shl nsw i64 %30, 1
  %32 = add nsw i64 %31, -1
  %33 = mul nsw i64 %32, %32
  %34 = load i64, ptr %3, align 8, !tbaa !9
  %35 = add nsw i64 %34, %30
  %36 = load i64, ptr %1, align 8, !tbaa !9
  %.not = icmp sgt i64 %35, %36
  br i1 %.not, label %49, label %37

37:                                               ; preds = %0
  %38 = mul i64 %32, %31
  %39 = load i64, ptr %4, align 8, !tbaa !9
  %40 = icmp sgt i64 %39, %30
  br i1 %40, label %41, label %49

41:                                               ; preds = %37
  %42 = mul i64 %31, %31
  %43 = icmp sgt i64 %34, %30
  br i1 %43, label %44, label %49

44:                                               ; preds = %41
  %45 = add nsw i64 %42, %31
  %46 = add nsw i64 %39, %30
  %47 = load i64, ptr %2, align 8, !tbaa !9
  %.not6 = icmp sgt i64 %46, %47
  %48 = select i1 %.not6, i64 0, i64 %31
  %spec.select = add nsw i64 %45, %48
  br label %49

49:                                               ; preds = %44, %37, %41, %0
  %.0 = phi i64 [ %42, %41 ], [ %38, %37 ], [ %33, %0 ], [ %spec.select, %44 ]
  %50 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %.0)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret i32 0
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #3 align 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 = { "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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass