      real :: n,d
      real :: numWatch
      integer :: ans
      
      read*,n,d
      
      numWatch = d*2 + 1
      
      ans = int( ceiling(n / numWatch) )
      
      print*,ans
      
      end
; ModuleID = 'FIRModule'
source_filename = "FIRModule"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@_QQcl.89acc03ce85aebc85fce0c290fbf59de = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_3716/source.f\00"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

define void @_QQmain() local_unnamed_addr {
  %1 = alloca float, align 4
  %2 = alloca float, align 4
  %3 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.89acc03ce85aebc85fce0c290fbf59de, i32 5)
  %4 = call i1 @_FortranAioInputReal32(ptr %3, ptr nonnull %2)
  %5 = call i1 @_FortranAioInputReal32(ptr %3, ptr nonnull %1)
  %6 = call i32 @_FortranAioEndIoStatement(ptr %3)
  %7 = load float, ptr %1, align 4, !tbaa !3
  %8 = fmul contract float %7, 2.000000e+00
  %9 = fadd contract float %8, 1.000000e+00
  %10 = load float, ptr %2, align 4, !tbaa !3
  %11 = fdiv contract float %10, %9
  %12 = call contract float @llvm.ceil.f32(float %11)
  %13 = fptosi float %12 to i32
  %14 = call ptr @_FortranAioBeginExternalListOutput(i32 -1, ptr nonnull @_QQcl.89acc03ce85aebc85fce0c290fbf59de, i32 11)
  %15 = call i1 @_FortranAioOutputInteger32(ptr %14, i32 %13)
  %16 = call i32 @_FortranAioEndIoStatement(ptr %14)
  ret void
}

declare ptr @_FortranAioBeginExternalListInput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioInputReal32(ptr, ptr) local_unnamed_addr

declare i32 @_FortranAioEndIoStatement(ptr) local_unnamed_addr

declare ptr @_FortranAioBeginExternalListOutput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger32(ptr, i32) local_unnamed_addr

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.ceil.f32(float) #0

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!llvm.module.flags = !{!0, !1, !2}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{!4, !4, i64 0}
!4 = !{!"any data access", !5, i64 0}
!5 = !{!"any access", !6, i64 0}
!6 = !{!"Flang Type TBAA Root"}
