; LLVM IR from eyangch/competitive-programming :: Codeforces/1492 (c)

; 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::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"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" }

@N = external dso_local global i32, align 4
@M = external dso_local global i32, align 4
@fw = external dso_local global [200000 x i32], align 16
@bk = external dso_local global [200000 x i32], align 16
@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_Z1tB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 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 i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %9 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %10 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %11 = getelementptr i8, ptr %10, i64 -24
  %12 = load i64, ptr %11, align 8
  %13 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %12
  %14 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %13, ptr noundef null)
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @N)
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %15, ptr noundef nonnull align 4 dereferenceable(4) @M)
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %16, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %18 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %17, ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  store i32 0, ptr %2, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  store i32 0, ptr %3, align 4, !tbaa !8
  br label %19

19:                                               ; preds = %46, %0
  %20 = load i32, ptr %2, align 4, !tbaa !8
  %21 = load i32, ptr @M, align 4, !tbaa !8
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  br label %49

24:                                               ; preds = %19
  br label %25

25:                                               ; preds = %37, %24
  %26 = load i32, ptr %3, align 4, !tbaa !8
  %27 = sext i32 %26 to i64
  %28 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %27)
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = sext i8 %29 to i32
  %31 = load i32, ptr %2, align 4, !tbaa !8
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11, i64 noundef %32)
  %34 = load i8, ptr %33, align 1, !tbaa !11
  %35 = sext i8 %34 to i32
  %36 = icmp ne i32 %30, %35
  br i1 %36, label %37, label %40

37:                                               ; preds = %25
  %38 = load i32, ptr %3, align 4, !tbaa !8
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %3, align 4, !tbaa !8
  br label %25, !llvm.loop !12

40:                                               ; preds = %25
  %41 = load i32, ptr %3, align 4, !tbaa !8
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %3, align 4, !tbaa !8
  %43 = load i32, ptr %2, align 4, !tbaa !8
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [200000 x i32], ptr @fw, i64 0, i64 %44
  store i32 %41, ptr %45, align 4, !tbaa !8
  br label %46

46:                                               ; preds = %40
  %47 = load i32, ptr %2, align 4, !tbaa !8
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %2, align 4, !tbaa !8
  br label %19, !llvm.loop !14

49:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #6
  %50 = load i32, ptr @M, align 4, !tbaa !8
  %51 = sub nsw i32 %50, 1
  store i32 %51, ptr %4, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #6
  %52 = load i32, ptr @N, align 4, !tbaa !8
  %53 = sub nsw i32 %52, 1
  store i32 %53, ptr %5, align 4, !tbaa !8
  br label %54

54:                                               ; preds = %80, %49
  %55 = load i32, ptr %4, align 4, !tbaa !8
  %56 = icmp sge i32 %55, 0
  br i1 %56, label %58, label %57

57:                                               ; preds = %54
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #6
  br label %83

58:                                               ; preds = %54
  br label %59

59:                                               ; preds = %71, %58
  %60 = load i32, ptr %5, align 4, !tbaa !8
  %61 = sext i32 %60 to i64
  %62 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %61)
  %63 = load i8, ptr %62, align 1, !tbaa !11
  %64 = sext i8 %63 to i32
  %65 = load i32, ptr %4, align 4, !tbaa !8
  %66 = sext i32 %65 to i64
  %67 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11, i64 noundef %66)
  %68 = load i8, ptr %67, align 1, !tbaa !11
  %69 = sext i8 %68 to i32
  %70 = icmp ne i32 %64, %69
  br i1 %70, label %71, label %74

71:                                               ; preds = %59
  %72 = load i32, ptr %5, align 4, !tbaa !8
  %73 = add nsw i32 %72, -1
  store i32 %73, ptr %5, align 4, !tbaa !8
  br label %59, !llvm.loop !15

74:                                               ; preds = %59
  %75 = load i32, ptr %5, align 4, !tbaa !8
  %76 = add nsw i32 %75, -1
  store i32 %76, ptr %5, align 4, !tbaa !8
  %77 = load i32, ptr %4, align 4, !tbaa !8
  %78 = sext i32 %77 to i64
  %79 = getelementptr inbounds [200000 x i32], ptr @bk, i64 0, i64 %78
  store i32 %75, ptr %79, align 4, !tbaa !8
  br label %80

80:                                               ; preds = %74
  %81 = load i32, ptr %4, align 4, !tbaa !8
  %82 = add nsw i32 %81, -1
  store i32 %82, ptr %4, align 4, !tbaa !8
  br label %54, !llvm.loop !16

83:                                               ; preds = %57
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  store i32 0, ptr %6, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  store i32 0, ptr %7, align 4, !tbaa !8
  br label %84

84:                                               ; preds = %103, %83
  %85 = load i32, ptr %7, align 4, !tbaa !8
  %86 = load i32, ptr @M, align 4, !tbaa !8
  %87 = sub nsw i32 %86, 1
  %88 = icmp slt i32 %85, %87
  br i1 %88, label %90, label %89

89:                                               ; preds = %84
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  br label %106

90:                                               ; preds = %84
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #6
  %91 = load i32, ptr %7, align 4, !tbaa !8
  %92 = add nsw i32 %91, 1
  %93 = sext i32 %92 to i64
  %94 = getelementptr inbounds [200000 x i32], ptr @bk, i64 0, i64 %93
  %95 = load i32, ptr %94, align 4, !tbaa !8
  %96 = load i32, ptr %7, align 4, !tbaa !8
  %97 = sext i32 %96 to i64
  %98 = getelementptr inbounds [200000 x i32], ptr @fw, i64 0, i64 %97
  %99 = load i32, ptr %98, align 4, !tbaa !8
  %100 = sub nsw i32 %95, %99
  store i32 %100, ptr %8, align 4, !tbaa !8
  %101 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %8, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %102 = load i32, ptr %101, align 4, !tbaa !8
  store i32 %102, ptr %6, align 4, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #6
  br label %103

103:                                              ; preds = %90
  %104 = load i32, ptr %7, align 4, !tbaa !8
  %105 = add nsw i32 %104, 1
  store i32 %105, ptr %7, align 4, !tbaa !8
  br label %84, !llvm.loop !17

106:                                              ; preds = %89
  %107 = load i32, ptr %6, align 4, !tbaa !8
  %108 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %107)
  %109 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %108, ptr noundef @.str)
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  %110 = load i32, ptr %1, align 4
  ret i32 %110
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) #1

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #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 = { "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 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { inlinehint 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 #6 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = !{!10, !10, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = distinct !{!15, !13}
!16 = distinct !{!16, !13}
!17 = distinct !{!17, !13}


; 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::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"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" }

@N = external dso_local global i32, align 4
@M = external dso_local global i32, align 4
@fw = external dso_local local_unnamed_addr global [200000 x i32], align 16
@bk = external dso_local local_unnamed_addr global [200000 x i32], align 16
@_Z1sB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_Z1tB5cxx11 = external dso_local global %"class.std::__cxx11::basic_string", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 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 i32, align 4
  %3 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %4 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %5 = getelementptr i8, ptr %4, i64 -24
  %6 = load i64, ptr %5, align 8
  %7 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %6
  %8 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %7, ptr noundef null)
  %9 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @N)
  %10 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %9, ptr noundef nonnull align 4 dereferenceable(4) @M)
  %11 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %10, ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11)
  %12 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %11, ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11)
  %13 = load i32, ptr @M, align 4, !tbaa !8
  %14 = icmp sgt i32 %13, 0
  br i1 %14, label %.preheader26, label %._crit_edge34.thread

.preheader26:                                     ; preds = %0, %24
  %indvars.iv39 = phi i64 [ %indvars.iv.next40, %24 ], [ 0, %0 ]
  %.02130 = phi i64 [ %26, %24 ], [ 0, %0 ]
  %sext = shl i64 %.02130, 32
  %15 = ashr exact i64 %sext, 32
  br label %19

._crit_edge:                                      ; preds = %24
  %16 = icmp sgt i32 %28, 0
  br i1 %16, label %.preheader.preheader, label %._crit_edge34.thread

.preheader.preheader:                             ; preds = %._crit_edge
  %17 = load i32, ptr @N, align 4, !tbaa !8
  %18 = zext nneg i32 %28 to i64
  br label %.preheader

19:                                               ; preds = %19, %.preheader26
  %indvars.iv = phi i64 [ %indvars.iv.next, %19 ], [ %15, %.preheader26 ]
  %20 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv)
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11, i64 noundef %indvars.iv39)
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %.not25 = icmp eq i8 %21, %23
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  br i1 %.not25, label %24, label %19, !llvm.loop !12

24:                                               ; preds = %19
  %25 = trunc nsw i64 %indvars.iv to i32
  %26 = add i64 %indvars.iv, 1
  %27 = getelementptr inbounds [200000 x i32], ptr @fw, i64 0, i64 %indvars.iv39
  store i32 %25, ptr %27, align 4, !tbaa !8
  %indvars.iv.next40 = add nuw nsw i64 %indvars.iv39, 1
  %28 = load i32, ptr @M, align 4, !tbaa !8
  %29 = sext i32 %28 to i64
  %30 = icmp slt i64 %indvars.iv.next40, %29
  br i1 %30, label %.preheader26, label %._crit_edge, !llvm.loop !14

.preheader:                                       ; preds = %.preheader.preheader, %38
  %indvars.iv45 = phi i64 [ %18, %.preheader.preheader ], [ %indvars.iv.next46, %38 ]
  %.019.in32 = phi i32 [ %17, %.preheader.preheader ], [ %39, %38 ]
  %indvars.iv.next46 = add nsw i64 %indvars.iv45, -1
  %31 = sext i32 %.019.in32 to i64
  br label %33

._crit_edge34.thread:                             ; preds = %._crit_edge, %0
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  store i32 0, ptr %1, align 4, !tbaa !8
  br label %._crit_edge37

._crit_edge34:                                    ; preds = %38
  %.pre = load i32, ptr @M, align 4, !tbaa !8
  %32 = icmp sgt i32 %.pre, 1
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  store i32 0, ptr %1, align 4, !tbaa !8
  br i1 %32, label %.lr.ph, label %._crit_edge37

33:                                               ; preds = %.preheader, %33
  %indvars.iv42 = phi i64 [ %31, %.preheader ], [ %indvars.iv.next43, %33 ]
  %indvars.iv.next43 = add nsw i64 %indvars.iv42, -1
  %34 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1sB5cxx11, i64 noundef %indvars.iv.next43)
  %35 = load i8, ptr %34, align 1, !tbaa !11
  %36 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) @_Z1tB5cxx11, i64 noundef %indvars.iv.next46)
  %37 = load i8, ptr %36, align 1, !tbaa !11
  %.not = icmp eq i8 %35, %37
  br i1 %.not, label %38, label %33, !llvm.loop !15

38:                                               ; preds = %33
  %39 = trunc nsw i64 %indvars.iv.next43 to i32
  %40 = getelementptr inbounds [200000 x i32], ptr @bk, i64 0, i64 %indvars.iv.next46
  store i32 %39, ptr %40, align 4, !tbaa !8
  %41 = icmp sgt i64 %indvars.iv45, 1
  br i1 %41, label %.preheader, label %._crit_edge34, !llvm.loop !16

._crit_edge37:                                    ; preds = %.lr.ph, %._crit_edge34.thread, %._crit_edge34
  %42 = phi i32 [ 0, %._crit_edge34 ], [ 0, %._crit_edge34.thread ], [ %51, %.lr.ph ]
  %43 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %42)
  %44 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %43, ptr noundef nonnull @.str)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #6
  ret i32 0

.lr.ph:                                           ; preds = %._crit_edge34, %.lr.ph
  %indvars.iv48 = phi i64 [ %indvars.iv.next49, %.lr.ph ], [ 0, %._crit_edge34 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #6
  %indvars.iv.next49 = add nuw nsw i64 %indvars.iv48, 1
  %45 = getelementptr inbounds [200000 x i32], ptr @bk, i64 0, i64 %indvars.iv.next49
  %46 = load i32, ptr %45, align 4, !tbaa !8
  %47 = getelementptr inbounds [200000 x i32], ptr @fw, i64 0, i64 %indvars.iv48
  %48 = load i32, ptr %47, align 4, !tbaa !8
  %49 = sub nsw i32 %46, %48
  store i32 %49, ptr %2, align 4, !tbaa !8
  %50 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %51 = load i32, ptr %50, align 4, !tbaa !8
  store i32 %51, ptr %1, align 4, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #6
  %52 = load i32, ptr @M, align 4, !tbaa !8
  %53 = add nsw i32 %52, -1
  %54 = sext i32 %53 to i64
  %55 = icmp slt i64 %indvars.iv.next49, %54
  br i1 %55, label %.lr.ph, label %._crit_edge37, !llvm.loop !17
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) 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) #3

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #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 = { "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 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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { inlinehint 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 #6 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = !{!10, !10, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = distinct !{!15, !13}
!16 = distinct !{!16, !13}
!17 = distinct !{!17, !13}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass