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dsa1 min read

Find the next greater element for each query in O(n+m) using a monotonic stack on nums2 and a lookup map.

March 19, 2026Read →

dsa1 min read

Find the next greater element in a circular array by iterating twice (0 to 2n) and using a monotonic stack.

March 19, 2026Read →

dsa1 min read

Calculate the stock price span (consecutive days <= today) using a monotonic stack that accumulates spans.

March 19, 2026Read →

dsa2 min read

Remove k digits to form the smallest number by maintaining a monotonic increasing stack and greedy removal.

March 19, 2026Read →

dsa2 min read

Decode a string with nested encodings like 3[a2[bc]] using two stacks: one for counts and one for partial strings.

March 19, 2026Read →

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