<p>A transaction is possibly invalid if:</p>

<ul>
	<li>the amount exceeds <code>$1000</code>, or;</li>
	<li>if it occurs within (and including) <code>60</code> minutes of another transaction with the <strong>same name</strong> in a <strong>different city</strong>.</li>
</ul>

<p>You are given an array of strings <code>transaction</code> where <code>transactions[i]</code> consists of comma-separated values representing the name, time (in minutes), amount, and city of the transaction.</p>

<p>Return a list of <code>transactions</code> that are possibly invalid. You may return the answer in <strong>any order</strong>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;alice,50,100,beijing&quot;]
<strong>Output:</strong> [&quot;alice,20,800,mtv&quot;,&quot;alice,50,100,beijing&quot;]
<strong>Explanation:</strong> The first transaction is invalid because the second transaction occurs within a difference of 60 minutes, have the same name and is in a different city. Similarly the second one is invalid too.</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;alice,50,1200,mtv&quot;]
<strong>Output:</strong> [&quot;alice,50,1200,mtv&quot;]
</pre>

<p><strong class="example">Example 3:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;bob,50,1200,mtv&quot;]
<strong>Output:</strong> [&quot;bob,50,1200,mtv&quot;]
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>transactions.length &lt;= 1000</code></li>
	<li>Each <code>transactions[i]</code> takes the form <code>&quot;{name},{time},{amount},{city}&quot;</code></li>
	<li>Each <code>{name}</code> and <code>{city}</code> consist of lowercase English letters, and have lengths between <code>1</code> and <code>10</code>.</li>
	<li>Each <code>{time}</code> consist of digits, and represent an integer between <code>0</code> and <code>1000</code>.</li>
	<li>Each <code>{amount}</code> consist of digits, and represent an integer between <code>0</code> and <code>2000</code>.</li>
</ul>

class Solution:
    def __init__(self):
        self.all_transactions = dict()
        self.all_transactions["name"] = list()
        self.all_transactions["time"] = list()
        self.all_transactions["amount"] = list()
        self.all_transactions["location"] = list()

    def _buildTransactionDictList(self, name, time, amount, location):
        self.all_transactions["name"].append(name)
        self.all_transactions["time"].append(time)
        self.all_transactions["amount"].append(amount)
        self.all_transactions["location"].append(location)

    def invalidTransactions(self, transactions: List[str]) -> List[str]:
        invalid_transactions = list()

        for transaction in transactions:
            name, time, amount, location = transaction.split(",")
            self._buildTransactionDictList(name, time, amount, location)
        
        invalid_idxes = list()
        for i in range(len(self.all_transactions["name"])):
            if int(self.all_transactions["amount"][i]) > 1000:
                invalid_idxes.append(i)
            for j in range(i+1, len(self.all_transactions["name"])):
                if self.all_transactions["name"][i] == self.all_transactions["name"][j] \
                    and self.all_transactions["location"][i] != self.all_transactions["location"][j] \
                    and abs(int(self.all_transactions["time"][i]) - int(self.all_transactions["time"][j])) <= 60:
                    invalid_idxes.append(i)
                    invalid_idxes.append(j)
                    continue
        invalid_idxes = set(invalid_idxes)

        for invalid_idx in invalid_idxes:
            invalid_transaction = "{},{},{},{}".format(self.all_transactions["name"][invalid_idx],
                                                       self.all_transactions["time"][invalid_idx],
                                                       self.all_transactions["amount"][invalid_idx],
                                                       self.all_transactions["location"][invalid_idx])
            invalid_transactions.append(invalid_transaction)
        
        return invalid_transactions
230