1169 - Invalid Transactions.

Medium

A transaction is possibly invalid if:

• the amount exceeds $1000, or;

• if it occurs within (and including) 60 minutes of another transaction with the same name in a different city.

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

Return a list of transactions that are possibly invalid. You may return the answer in any order.

Example 1:

Input: transactions = "alice,20,800,mtv","alice,50,100,beijing"

Output: "alice,20,800,mtv","alice,50,100,beijing"

Explanation: 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.

Example 2:

Input: transactions = "alice,20,800,mtv","alice,50,1200,mtv"

Output: "alice,50,1200,mtv"

Example 3:

Input: transactions = "alice,20,800,mtv","bob,50,1200,mtv"

Output: "bob,50,1200,mtv"

Constraints:

• transactions.length <= 1000

• Each transactions[i] takes the form "{name},{time},{amount},{city}"

• Each {name} and {city} consist of lowercase English letters, and have lengths between 1 and 10.

• Each {time} consist of digits, and represent an integer between 0 and 1000.

• Each {amount} consist of digits, and represent an integer between 0 and 2000.