Leetcode day1

leetcode/lc3/notes.md

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+My first sliding window problem. 
+Sliding Window is an algorithmic technique used to process a contiguous subarray or substring by maintaining a moving window over the input, where thewindow expands and/or shrinks while traversing the data to efficiently compute results in linear time.
+
+When to use Sliding Window :
+
+>Subarray / substring problems
+
+>Problems asking for:
+
+1)longest / shortest window
+
+2)maximum / minimum sum
+
+3)unique elements in a range
+
+4)Continuous range constraints