Is Longest Team Pass Streak easy or hard?

It is rated Hard on FleetCode with a 40.2% acceptance rate. The difficulty comes from identifying streak boundaries, not from the syntax. Once you recognize the gaps and islands pattern, the query becomes straightforward to write.

Longest Team Pass Streak Python or Java solution?

This problem is a SQL problem, so the solution is written as a MySQL query rather than in Python or Java. The default approach on FleetCode is available in MySQL. If you want a procedural version for practice, you can simulate the same logic by sorting records and scanning them once while tracking the current streak length.

How to solve Longest Team Pass Streak in O(n log n)?

Sort passes by time per team using a window function, then compute a streak key by subtracting a sequential row number from a second sequence that marks the streak condition. Rows that share a key belong to the same streak. Group by team and key, count rows in each group, and select the maximum per team.

What is the best approach for Longest Team Pass Streak?

The best approach is gaps and islands using window functions. Assign a ROW_NUMBER() ordered by time within each team, derive a group key that stays constant across each streak, then group and take the maximum count. It runs in O(n log n) time because of the sort, with O(n) space for the intermediate results.

What data structure is used in Longest Team Pass Streak?

There is no explicit data structure beyond the relational table. The solution relies on SQL window functions, specifically ROW_NUMBER(), along with common table expressions and GROUP BY aggregation. Intermediate results are held in temporary result sets, not custom structures.

What is the time complexity of Longest Team Pass Streak?

The optimal solution runs in O(n log n) time, dominated by sorting the passes within each team. The naive self-join chain extension runs in O(n^2) time because it can rescan the table for every starting pass. Space is O(n) for the intermediate CTEs in both cases.

Is Longest Team Pass Streak asked at Google, Amazon, or Meta?

FleetCode tags this problem under General, so there is no verified company breakdown for it on the platform. The gaps and islands pattern itself appears often in SQL interviews at large tech companies, so practicing it is useful regardless of the specific problem.

Description Solution

3390. Longest Team Pass Streak

Hard40.2% acceptancePremium elsewhere, free here

Table: Teams

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| player_id   | int     |
| team_name   | varchar | 
+-------------+---------+
player_id is the unique key for this table.
Each row contains the unique identifier for player and the name of one of the teams participating in that match.

Table: Passes

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| pass_from   | int     |
| time_stamp  | varchar |
| pass_to     | int     |
+-------------+---------+
(pass_from, time_stamp) is the unique key for this table.
pass_from is a foreign key to player_id from Teams table.
Each row represents a pass made during a match, time_stamp represents the time in minutes (00:00-90:00) when the pass was made,
pass_to is the player_id of the player receiving the pass.

Write a solution to find the longest successful pass streak for each team during the match. The rules are as follows:

A successful pass streak is defined as consecutive passes where:
- Both the pass_from and pass_to players belong to the same team
A streak breaks when either:
- The pass is intercepted (received by a player from the opposing team)

Return the result table ordered by team_name in ascending order.

The result format is in the following example.

Example:

Input:

Teams table:

+-----------+-----------+
| player_id | team_name |
+-----------+-----------+
| 1         | Arsenal   |
| 2         | Arsenal   |
| 3         | Arsenal   |
| 4         | Arsenal   |
| 5         | Chelsea   |
| 6         | Chelsea   |
| 7         | Chelsea   |
| 8         | Chelsea   |
+-----------+-----------+

Passes table:

+-----------+------------+---------+
| pass_from | time_stamp | pass_to |
+-----------+------------+---------+
| 1         | 00:05      | 2       |
| 2         | 00:07      | 3       |
| 3         | 00:08      | 4       |
| 4         | 00:10      | 5       |
| 6         | 00:15      | 7       |
| 7         | 00:17      | 8       |
| 8         | 00:20      | 6       |
| 6         | 00:22      | 5       |
| 1         | 00:25      | 2       |
| 2         | 00:27      | 3       |
+-----------+------------+---------+

Output:

+-----------+----------------+
| team_name | longest_streak |
+-----------+----------------+
| Arsenal   | 3              |
| Chelsea   | 4              |
+-----------+----------------+

Explanation:

Arsenal's streaks:
- First streak: 3 passes (1→2→3→4) ended when player 4 passed to Chelsea's player 5
- Second streak: 2 passes (1→2→3)
- Longest streak = 3
Chelsea's streaks:
- First streak: 3 passes (6→7→8→6→5)
- Longest streak = 4

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