Banking_System.txt

class Bank {

    long arr[];
    public Bank(long[] balance) {
        int n = balance.length;
        arr = new long[n];
        for(int i =0; i<n; i++)
            arr[i] = balance[i];
    }
    
    public boolean transfer(int account1, int account2, long money) {
        
        
        if(account1-1 < 0 || account1-1 >=arr.length || account2-1 < 0 || account2-1 >=arr.length)return false;
        
        long val1 = arr[account1 - 1];
        long val2 = arr[account2 - 1];
        
        if(val1 - money < 0)return false;
        
        val1 = val1 - money;
        arr[account1-1] = val1;
        arr[account2-1] = val2+money;
        return true;
    }
    //Added indentation
    public boolean deposit(int account, long money) {
        
        if(account-1 < 0 || account-1 >=arr.length)
          return false;
        
        long val = arr[account - 1];
        val = val + money;
        if(val < 0)return false;
        
        arr[account - 1] = val;
        return true;
    }
    
    public boolean withdraw(int account, long money) {
        
        if(account-1 < 0 || account-1 >=arr.length)return false;
        
        long val = arr[account - 1];
        if(val - money < 0)return false;
        
        arr[account-1] = val - money;
        return true;
    }
}

/**
 * Your Bank object will be instantiated and called as such:
 * Bank obj = new Bank(balance);
 * boolean param_1 = obj.transfer(account1,account2,money);
 * boolean param_2 = obj.deposit(account,money);
 * boolean param_3 = obj.withdraw(account,money);
 */