Requirement;
User can select all records at once, and can be perform manual selection based on business requirement.
After record selection user needs to click on any button (Activate, Inactivate)
When Activate button is clicked then it activate all the selected account.
When Deactivate button is clicked then it deactivate all the selected account. After the execution it will redirect to the Page (Home).

public class ActiveAccAss2
{
private integer totalRecs = 0;
private integer OffsetSize = 0;
private integer LimitSize= 5;

public List<Account> AccountsOrigList {get;set;}
public List<AccountWrapper> AccountsWrappersList {get;set;}
    
public ActiveAccAss2()
{
totalRecs = [select count() from account];
}
    
 ApexPages.StandardSetController setCon {
        get {
            setCon = new ApexPages.StandardSetController(Database.getQueryLocator(
            [SELECT  Name, ID, Phone,Active__c FROM Account LIMIT :LimitSize]));
			
         return setCon;
        }
        set;
    }
    
    public List<AccountWrapper> getAccountList() {
        if (AccountsOrigList == null)
        { AccountsOrigList = setCon.getRecords(); 
          AccountsWrappersList = new List<AccountWrapper>();
          for (Account avar : AccountsOrigList)
          {
            AccountsWrappersList.add(new AccountWrapper(avar,false));
          }
        }  
        
        return AccountsWrappersList ;
    }
    
    
    public class AccountWrapper
    {
        public Account acc {get; private set;}
        public Boolean DeleteInd {get; set;}
      
        public AccountWrapper(Account a , Boolean dInd)
          {
           DeleteInd = dInd;
           acc = a;
          }
    }
    
    public Pagereference SaveAcc()
     {
        List<Account> AccountsToDelete = new List<Account>();
        List<Account> AccountsToUpsert = new List<Account>();  
 
        for (AccountWrapper avar : AccountsWrappersList )
        {
            if (avar.DeleteInd == True)
                {
                 if (avar.acc.id != null)               
                    {System.Debug (avar.acc.name);
                    AccountsToDelete.add(avar.acc);}
                    
                }
            else
                {AccountsToUpsert.add(avar.acc); }            
        }
      
       delete AccountsToDelete; 
       upsert AccountsToUpsert;
              
       AccountsOrigList = [SELECT Name, ID FROM Account] ;
       AccountsWrappersList = new List<AccountWrapper>();
       for (Account avar : AccountsOrigList)
          {
            AccountsWrappersList.add(new AccountWrapper(avar,false));
          }
       
      PageReference secondPage = Page.Thankyou;
      secondPage.setRedirect(true);
      return secondPage; 

         
     }
 
 
public Account lastGoal {get; private set;}

  public void deleteLast()
    {
        delete lastGoal;
    }
    
   
public void FirstPage()
{
OffsetSize = 0;
}
    
public void previous()
{
OffsetSize = OffsetSize-LimitSize;
}
    
public void next()
{
OffsetSize = OffsetSize + LimitSize;
}
    
public void LastPage()
{
OffsetSize = totalrecs-math.mod(totalRecs,LimitSize);
}
    
public boolean getprev()
{
if(OffsetSize == 0)
return true;
else
return false;
}
    
public boolean getnxt()
{
if((OffsetSize + LimitSize) > totalRecs)
return true;
else
return false;
}     
}

<apex:page controller="ActiveAccAss2" >
    <apex:form >
        <apex:pageBlock id="details">
             <apex:pageBlockTable value="{!AccountList}" var="a" id="AccDMLTable">
             <apex:column headerValue="S.No">
            <apex:inputCheckbox value="{!a.DeleteInd}" rendered="true"/>
            </apex:column>
            <apex:column headerValue="Account Name" >
            <apex:outputField value="{!a.acc.Name}"/>
            </apex:column>
            <apex:column value="{!a.acc.ID}"/>
            <apex:column value="{!a.acc.Phone}"/>
            <apex:column value="{!a.acc.Active__c}"/>
           
            </apex:pageBlockTable>
            
            <apex:commandButton value="Delete" action="{!SaveAcc}" reRender="AccDMLTable"/>    
            <apex:commandButton value="Activate/deactivate" reRender="AccDMLTable"/>            
       
            <apex:pageblockButtons >
                <apex:commandButton value="First Page" rerender="details" action="{!FirstPage}" disabled="{!prev}"/>
                <apex:commandButton value="Previous" rerender="details" action="{!previous}" disabled="{!prev}"/>
                <apex:commandButton value="Next" rerender="details" action="{!next}" disabled="{!nxt}"/>
                <apex:commandButton value="Last Page" rerender="details" action="{!LastPage}" disabled="{!nxt}"/>"
            </apex:pageblockButtons>
        </apex:pageBlock>
        </apex:form>
</apex:page>