Codechef ATM problem solution

Pooja would like to withdraw X $US from an ATM. The cash machine will only accept the transaction if X is a multiple of 5, and Pooja’s account balance has enough cash to perform the withdrawal transaction (including bank charges). For each successful withdrawal the bank charges 0.50 $US. Calculate Pooja’s account balance after an attempted transaction.

Input

Positive integer 0 < X <= 2000 - the amount of cash which Pooja wishes to withdraw.

Nonnegative number 0<= Y <= 2000 with two digits of precision - Pooja’s initial account balance.

Output

Output the account balance after the attempted transaction, given as a number with two digits of precision. If there is not enough money in the account to complete the transaction, output the current bank balance.

Example - Successful Transaction

Input:
30 120.00

Output:
89.50

Example - Incorrect Withdrawal Amount (not multiple of 5)

Input:
42 120.00
Output:
120.00

Example - Insufficient Funds

Input:
300 120.00

Output:
120.00

codechef ATM problem solution in java

import java.util.Scanner;
//HS08TEST

class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double withdraw = sc.nextDouble();
        double balance = sc.nextDouble();

        if (balance >= withdraw + 0.5 && withdraw % 5 == 0) {
            balance -= withdraw + 0.5;
        }

        System.out.printf("%.2f", balance);

        sc.close();
    }
}