bitcoin_brute_force

package com.example.cefaloschoolproject.commands;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    static class Transaction {
        private int id;
        private long size;
        private double fee;
        public Transaction(int id, long size, double fee) {
            this.id = id;
            this.size = size;
            this.fee = fee;
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public long getSize() {
            return size;
        }

        public void setSize(long size) {
            this.size = size;
        }

        public double getFee() {
            return fee;
        }

        public void setFee(double fee) {
            this.fee = fee;
        }
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        List<Transaction> transactions = new ArrayList<>();
        int toalNumberOfTransactions = 12;
        for(int i =0;i<toalNumberOfTransactions;i++){
            String line = sc.nextLine();
            String[] tokens = line.split(" ");
            int id = Integer.parseInt(tokens[0]);
            long byteSize = Long.parseLong(tokens[1]);
            double fee = Double.parseDouble(tokens[2]);
            transactions.add(new Transaction(id,byteSize,fee));
        }
        int resultSet = 0;
        long maxBytes = 1000000;
        double result = 0;
        double eps = 1e-15;
        double defaultReward = 12.5;
        for(int mask=0;mask<(1<<toalNumberOfTransactions);mask++){
            long byteForCurrentSet = 0;
            double currentScore = 0;
            for(int j=0;j<toalNumberOfTransactions;j++)
            {
                Transaction t = transactions.get(j);
                if((mask&(1<<j))!=0){
                    byteForCurrentSet+=t.getSize();
                    currentScore+=t.getFee();
                }
            }
            if(byteForCurrentSet<=maxBytes && result+eps<currentScore){
                result = currentScore;
                resultSet = mask;
            }
        }
        System.out.println("Current Score = " + (result+defaultReward ) + "BTC");
        long sizeTaken = 0;
        for(int i=0;i<toalNumberOfTransactions;i++)
        {
            if((resultSet&(1<<i))!=0){
                Transaction t = transactions.get(i);
                sizeTaken+=t.getSize();
                System.out.println(String.format("Id = %d Size = %d Fee = %f",t.getId(),t.getSize(),t.getFee()));
            }
        }
        System.out.println(String.format("Size taken = %d",sizeTaken));
    }
}