How to write update query to check exist column by value 1 where it ex

Question

How to update check exist column by value 1 where partid exist on table FeaturesvalueA or FeaturesvalueB ?

I work on sql server 2012 I face issue I need to update column checkexist on table temp

where partid exist at least one time on table #FeaturesvalueA or table #FeaturesvalueB

But if partid exist on both tables then not update check exist by 1

i need only update check exist by 1 in case of exist on only one table from both

FeaturesvalueA or FeaturesvalueB

case of not update

IF partid exist on both tables #FeaturesvalueA and #FeaturesvalueB then no need to update column check exist by 1

IF partid not exist on both tables #FeaturesvalueA and #FeaturesvalueB then no need to update column check exist by 1

case of update

IF partid exist on only one tables from #FeaturesvalueA or #FeaturesvalueB then update check exist by 1

create table #temp
 (
 PartId int ,
 checkexist int,
 )
 insert into #temp(PartId,checkexist)
 values
 (555,0),
 (999,0),
 (1200,0),
 (1300,0),
 (1010,0),
 (1500,0)


 create table #FeaturesvalueA
 (
 PartId int,
 FeatureName nvarchar(50),
 FeatureValue  nvarchar(50),
 updatedStuffDiff nvarchar(500)
 )
 insert into #FeaturesvalueA(PartId,FeatureName,FeatureValue)
 values
 (555,'Temperature','5c'),
 (555,'resistance','10c'),
 (1200,'Temperature','20c'),
 (1200,'resistance','30c'),
 (1010,'cold','40c'),
 (1010,'air','7c')


 create table #FeaturesvalueB
 (
 PartId int,
 FeatureName nvarchar(50),
 FeatureValue  nvarchar(50),
 updatedStuffDiff nvarchar(500)
 )
 insert into #FeaturesvalueB(PartId,FeatureName,FeatureValue)
 values
 (555,'Temperature','5c'),
 (555,'resistance','10c'),
 (999,'Temperature','20c'),
 (1300,'resistance','30c'),
 (1010,'cold','40c'),
 (1010,'air','7c')

Expected result

 PartId    checkexist
 555            0
 999            1
 1200            1
 1300            1
 1010            0
 1500            0