import java.util.$*$;

public class Payment $\{$

private HashMap userToAmount;

private PriorityQueue$>$ topUsers;

private static final int TOP$\_$USERS$\_$COUNT $=100$;

public Payment$()\{$

userToAmount $=$ new HashMap$<>()$;

topUsers $=$ new PriorityQueue$<>($Comparator$.$comparingInt$($Map$.$Entry::getValue$))$;

$\}$

public TransactionSummary makePayment$($int transactionId, int senderId$,$ int amount, TransactionType transactionType$)\{$

if $($transactionType $==$ TransactionType.P$2$M$)\{$

userToAmount.put$($senderId$,$ userToAmount.getOrDefault$($senderId$,0)+$ amount$)$;

Map.Entry currentUser $=$ new AbstractMap.SimpleEntry$<>($senderId$,$ userToAmount.get$($senderId$))$;

if $($topUsers$.$size$()<$ TOP$\_$USERS$\_$COUNT$)\{$

topUsers.add$($currentUser$)$;

$\}$ else if $($topUsers$.$peek$().$getValue$()<$ currentUser.getValue$())\{$

topUsers.poll$()$;

topUsers.add$($currentUser$)$;

$\}$

$\}$

boolean isSenderEligibleForReward $=$ topUsers.contains$($new AbstractMap.SimpleEntry$<>($senderId$,$ userToAmount.get$($senderId$)))$;

return new TransactionSummary$($transactionId$,$ isSenderEligibleForReward$)$;

$\}$

public int getNumberOfTransactions$($int senderId$,$ TransactionType transactionType$)\{$

return userToAmount.getOrDefault$($senderId$,0)$;

$\}$

$\}$