integer(8) N,M,ans
read*,N,M
if(N>=M/2)then
  ans=M/2
else
  ans=N+(M-2*N)/4
endif
print"(i0)",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.c3d85811bc4d5f39f291569122d7355f = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_7482/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 i64, align 8
  %2 = alloca i64, align 8
  %3 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.c3d85811bc4d5f39f291569122d7355f, i32 2)
  %4 = call i1 @_FortranAioInputInteger(ptr %3, ptr nonnull %2, i32 8)
  %5 = call i1 @_FortranAioInputInteger(ptr %3, ptr nonnull %1, i32 8)
  %6 = call i32 @_FortranAioEndIoStatement(ptr %3)
  %7 = load i64, ptr %2, align 8, !tbaa !3
  %8 = load i64, ptr %1, align 8, !tbaa !3
  %9 = sdiv i64 %8, 2
  %.not = icmp slt i64 %7, %9
  br i1 %.not, label %10, label %15

10:                                               ; preds = %0
  %11 = shl i64 %7, 1
  %12 = sub i64 %8, %11
  %13 = sdiv i64 %12, 4
  %14 = add i64 %13, %7
  br label %15

15:                                               ; preds = %0, %10
  %.0 = phi i64 [ %14, %10 ], [ %9, %0 ]
  %16 = call ptr @_FortranAioBeginExternalFormattedOutput(ptr nonnull @_QQcl.28693029, i64 4, ptr null, i32 -1, ptr nonnull @_QQcl.c3d85811bc4d5f39f291569122d7355f, i32 8)
  %17 = call i1 @_FortranAioOutputInteger64(ptr %16, i64 %.0)
  %18 = call i32 @_FortranAioEndIoStatement(ptr %16)
  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 @_FortranAioOutputInteger64(ptr, i64) 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"}
