; LLVM IR from lzyrapx/Competitive-Programming :: 51Nod (1118（dp）)

; 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" }

@dp = external dso_local global [1001 x [1001 x i64]], align 16
@_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 i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  %7 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 4 dereferenceable(4) %3)
  store i64 1, ptr getelementptr inbounds ([1001 x [1001 x i64]], ptr @dp, i64 0, i64 1), align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 1, ptr %4, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %49, %0
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = load i32, ptr %2, align 4, !tbaa !9
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %52

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %45, %14
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = icmp sle i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  store i32 5, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %48

20:                                               ; preds = %15
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = sub nsw i32 %21, 1
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %23
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [1001 x i64], ptr %24, i64 0, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = load i32, ptr %4, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %30
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = sub nsw i32 %32, 1
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [1001 x i64], ptr %31, i64 0, i64 %34
  %36 = load i64, ptr %35, align 8, !tbaa !5
  %37 = add nsw i64 %28, %36
  %38 = srem i64 %37, 1000000007
  %39 = load i32, ptr %4, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %40
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [1001 x i64], ptr %41, i64 0, i64 %43
  store i64 %38, ptr %44, align 8, !tbaa !5
  br label %45

45:                                               ; preds = %20
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %6, align 4, !tbaa !9
  br label %15, !llvm.loop !11

48:                                               ; preds = %19
  br label %49

49:                                               ; preds = %48
  %50 = load i32, ptr %4, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %4, align 4, !tbaa !9
  br label %9, !llvm.loop !13

52:                                               ; preds = %13
  %53 = load i32, ptr %2, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %54
  %56 = load i32, ptr %3, align 4, !tbaa !9
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [1001 x i64], ptr %55, i64 0, i64 %57
  %59 = load i64, ptr %58, align 8, !tbaa !5
  %60 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %59)
  %61 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %60, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %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 noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

; 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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { 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 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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"

%"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" }

@dp = external dso_local local_unnamed_addr global [1001 x [1001 x i64]], align 16
@_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 i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %3 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 4 dereferenceable(4) %2)
  store i64 1, ptr getelementptr inbounds (i8, ptr @dp, i64 8008), align 8, !tbaa !5
  %5 = load i32, ptr %1, align 4, !tbaa !9
  %.not16 = icmp slt i32 %5, 1
  %.pre26 = load i32, ptr %2, align 4, !tbaa !9
  %.not1314 = icmp slt i32 %.pre26, 1
  %or.cond = select i1 %.not16, i1 true, i1 %.not1314
  br i1 %or.cond, label %._crit_edge18, label %.preheader.preheader

.preheader.preheader:                             ; preds = %0
  %6 = add nuw i32 %5, 1
  %wide.trip.count24 = zext i32 %6 to i64
  %7 = zext nneg i32 %.pre26 to i64
  %xtraiter = and i64 %7, 1
  %8 = icmp eq i32 %.pre26, 1
  %unroll_iter = and i64 %7, 2147483646
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %._crit_edge
  %indvars.iv21 = phi i64 [ 1, %.preheader.preheader ], [ %indvars.iv.next22, %._crit_edge ]
  %9 = add nsw i64 %indvars.iv21, -1
  %.phi.trans.insert = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %indvars.iv21, i64 0
  %.pre = load i64, ptr %.phi.trans.insert, align 8, !tbaa !5
  br i1 %8, label %._crit_edge.unr-lcssa, label %.preheader.new

._crit_edge18:                                    ; preds = %._crit_edge, %0
  %10 = sext i32 %5 to i64
  %11 = sext i32 %.pre26 to i64
  %12 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %10, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !5
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %13)
  %15 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %14, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0

._crit_edge.unr-lcssa:                            ; preds = %.preheader.new, %.preheader
  %.unr = phi i64 [ %.pre, %.preheader ], [ %30, %.preheader.new ]
  %indvars.iv.unr = phi i64 [ 1, %.preheader ], [ %indvars.iv.next.1, %.preheader.new ]
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.epilog-lcssa

._crit_edge.epilog-lcssa:                         ; preds = %._crit_edge.unr-lcssa
  %16 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %9, i64 %indvars.iv.unr
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = add nsw i64 %.unr, %17
  %19 = srem i64 %18, 1000000007
  %20 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %indvars.iv21, i64 %indvars.iv.unr
  store i64 %19, ptr %20, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.unr-lcssa, %._crit_edge.epilog-lcssa
  %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
  %exitcond25.not = icmp eq i64 %indvars.iv.next22, %wide.trip.count24
  br i1 %exitcond25.not, label %._crit_edge18, label %.preheader, !llvm.loop !11

.preheader.new:                                   ; preds = %.preheader, %.preheader.new
  %21 = phi i64 [ %30, %.preheader.new ], [ %.pre, %.preheader ]
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.preheader.new ], [ 1, %.preheader ]
  %niter = phi i64 [ %niter.next.1, %.preheader.new ], [ 0, %.preheader ]
  %22 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %9, i64 %indvars.iv
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %24 = add nsw i64 %21, %23
  %25 = srem i64 %24, 1000000007
  %26 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %indvars.iv21, i64 %indvars.iv
  store i64 %25, ptr %26, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %27 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %9, i64 %indvars.iv.next
  %28 = load i64, ptr %27, align 8, !tbaa !5
  %29 = add nsw i64 %25, %28
  %30 = srem i64 %29, 1000000007
  %31 = getelementptr inbounds [1001 x [1001 x i64]], ptr @dp, i64 0, i64 %indvars.iv21, i64 %indvars.iv.next
  store i64 %30, ptr %31, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.unr-lcssa, label %.preheader.new, !llvm.loop !13
}

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { mustprogress 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 = { 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 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass