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Validate SubSequence[Easy] C#

May 17, 20221 min read33 views

Approach: Given two sequence of numbers, start with two starting indexes, and increment second index if the element matched, keep incrementing the...

Validate SubSequence[Easy] C#

Spiral Traverse[Medium] C#

May 16, 20221 min read53 views

Approach: It is like getting the bunch of inner perimeters, start with 4 constants which maintain 4 corners, Do this will startRow<=endRow && startCol...

Spiral Traverse[Medium] C#

Closest to Binary Tree[Easy] C#

May 13, 20221 min read30 views

Approach: Use binary search to find the elements and keep updating the closest starting from the root being the closest. return closest using...

Closest to Binary Tree[Easy] C#

Is Array Monotonic[Medium] C#

May 12, 20221 min read17 views

Approach: Use two boolean flags increasing and decreasing initially set to true, loop though array start from i = 1 and update those flags by...

Is Array Monotonic[Medium] C#

Smallest Difference[Medium] C#

May 10, 20221 min read23 views

Sort the given two arrays. Start with two pointer approach. Both are the start indexes of the two arrays. Start the loop and start calculating the...

Smallest Difference[Medium] C#

Three Number Sum [Medium] C#

May 9, 20221 min read18 views

Time Complexity O(n^2)|O(n) Space Approach: Use a loop through all elements and use two pointer approach(Left and Right) along with...

Three Number Sum [Medium] C#