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Two pointers: one input, opposite ends
```python3
def fn(arr):
left = ans = 0
right = len(arr) - 1
while left < right:
# do some logic here with left and right
if CONDITION:
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fresheggtart / grokking_to_leetcode.md
Created August 12, 2025 04:00 — forked from tykurtz/grokking_to_leetcode.md
Grokking the coding interview equivalent leetcode problems

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window