Krishna

2nd year, AI & DS

[Krishna @Krishna11156]

Today's DSA Insight
One problem, two approaches: brute force vs. optimization
The real skill is knowing when to stop repeating work
3727 • Maximum Alternating Sum of Squares
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Sliding window: stop recalculating what you already know
Remove the outgoing element, add the incoming one
643, Maximum Average Subarray I
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Count distinct elements in each subarray, square the count, and add it up
2913, Subarrays Distinct Element Sum of Squares I
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Count distinct elements in each subarray, square the count, and add it up
2913, Subarrays Distinct Element Sum of Squares I
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@Siwe_e Thank you

[Krishna @Krishna11156]

Today's DSA Insight
Sometimes, the best optimization is avoiding repeated work
Think in prefix and suffix contributions
3727, Maximum Alternating Sum of Squares
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Sometimes, the best optimization is avoiding repeated work
Think in prefix and suffix contributions
3727, Maximum Alternating Sum of Squares
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Custom ordering doesn't need custom sorting logic
A priority map turns the problem into a simple comparison
791, Custom Sort String
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@SanuCodes thank you

[Krishna @Krishna11156]

Today's DSA Insight
Sometimes the simplest solution is the smartest
Filter by index, check the value, add the result
2778, Sum of Squares of Special Elements
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@Simran142007 ocassionally my brain returns an optimal solution😂

[Krishna @Krishna11156]

@WilliamJam0m Sure

[Krishna @Krishna11156]

Today's DSA Insight
Minimizing differences isn't about changing everything
It's about spending each operation where it matters most
2333, Minimum Sum of Squared Difference
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Not every imbalance needs a new pair
Sometimes, one insertion fixes two problems
1541, Minimum Insertions to Balance a Parentheses String
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

Today's DSA Insight
Removing outer parentheses is really about tracking depth
Only characters at depth 1 belong to the outer layer
1021, Remove Outermost Parentheses
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@AnshikaK7 9.74

[Krishna @Krishna11156]

Today's DSA Insight
Don't fix every bracket individually
Just track what's unmatched
921, Minimum Add to Make Parentheses Valid
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@Its_Vivaann thenku😇

[Krishna @Krishna11156]

Today's DSA Insight
Nested structures get easier when you track the depth instead of the details
856, Score of Parentheses
#LeetCode #DSA #Java #Programming

[Krishna @Krishna11156]

@harshith_irl ✌️

[Krishna @Krishna11156]

@Simran142007 🥲