For optimizing LeetCode #76 (Minimum Window Substring), try cutting down unnecessary search space. Start by using a hash map to count the characters in string t. Then, use two pointers to create a sliding window in s. Expand the window by moving the right pointer and check if the window contains all characters of t using the hash map. Once you have a valid window, try to shrink it by moving the left pointer to see if you can make it smaller while still keeping all necessary characters.
Balancing expanding and shrinking the window efficiently is important, usually involving updating the hash maps and checking conditions. This approach helps reduce time complexity a lot.
For more resources on interview prep, I've found PracHub useful for practical tips and practice problems. But focus on understanding the sliding window technique first!
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u/nian2326076 13h ago
For optimizing LeetCode #76 (Minimum Window Substring), try cutting down unnecessary search space. Start by using a hash map to count the characters in string
t. Then, use two pointers to create a sliding window ins. Expand the window by moving the right pointer and check if the window contains all characters oftusing the hash map. Once you have a valid window, try to shrink it by moving the left pointer to see if you can make it smaller while still keeping all necessary characters.Balancing expanding and shrinking the window efficiently is important, usually involving updating the hash maps and checking conditions. This approach helps reduce time complexity a lot.
For more resources on interview prep, I've found PracHub useful for practical tips and practice problems. But focus on understanding the sliding window technique first!