program main
  implicit none
  integer :: n, i, res, l, r
  read(*, *) n
  res = 0
  do i = 1, n
    read(*, *) l, r
    res = res + r - l + 1
  end do
  write(*, "(i0)") res
end program main

; 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.1b3eea86d7ea88a6263159b36a309d5e = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_6923/source.f\00"
@_QQcl.28693029 = linkonce constant [4 x i8] c"(i0)"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

define void @_QQmain() local_unnamed_addr {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.1b3eea86d7ea88a6263159b36a309d5e, i32 4)
  %5 = call i1 @_FortranAioInputInteger(ptr %4, ptr nonnull %2, i32 4)
  %6 = call i32 @_FortranAioEndIoStatement(ptr %4)
  %7 = load i32, ptr %2, align 4, !tbaa !3
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %0
  %9 = zext i32 %7 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %10 = phi i64 [ %20, %.lr.ph ], [ %9, %.lr.ph.preheader ]
  %.04 = phi i32 [ %19, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %11 = call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.1b3eea86d7ea88a6263159b36a309d5e, i32 7)
  %12 = call i1 @_FortranAioInputInteger(ptr %11, ptr nonnull %1, i32 4)
  %13 = call i1 @_FortranAioInputInteger(ptr %11, ptr nonnull %3, i32 4)
  %14 = call i32 @_FortranAioEndIoStatement(ptr %11)
  %15 = load i32, ptr %3, align 4, !tbaa !3
  %16 = load i32, ptr %1, align 4, !tbaa !3
  %17 = add i32 %.04, 1
  %18 = add i32 %17, %15
  %19 = sub i32 %18, %16
  %20 = add nsw i64 %10, -1
  %21 = icmp ugt i64 %10, 1
  br i1 %21, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.0.lcssa = phi i32 [ 0, %0 ], [ %19, %.lr.ph ]
  %22 = call ptr @_FortranAioBeginExternalFormattedOutput(ptr nonnull @_QQcl.28693029, i64 4, ptr null, i32 -1, ptr nonnull @_QQcl.1b3eea86d7ea88a6263159b36a309d5e, i32 10)
  %23 = call i1 @_FortranAioOutputInteger32(ptr %22, i32 %.0.lcssa)
  %24 = call i32 @_FortranAioEndIoStatement(ptr %22)
  ret void
}

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

declare i1 @_FortranAioInputInteger(ptr, ptr, i32) local_unnamed_addr

declare i32 @_FortranAioEndIoStatement(ptr) local_unnamed_addr

declare ptr @_FortranAioBeginExternalFormattedOutput(ptr, i64, ptr, i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger32(ptr, i32) local_unnamed_addr

!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"}
