Package g1101_1200.s1169_invalid_transactions

Class Solution

  • public class Solution
extends Object
    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.

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • invalidTransactions

        public List<String> invalidTransactions​(String[] input)