Blog

2026년 3월 28일 22 min read

[2026] Two Pointers | O(n²) → O(n) Optimization Technique Complete Guide

Master two pointers technique: O(n²) → O(n) optimization. Learn basic patterns, practical problems with principles, code examples, and coding interview ...
2026년 3월 28일 22 min read

[2026] Sliding Window | Subarray Optimization Technique Complete Guide

Sliding window algorithm optimizes fixed and variable-length contiguous ranges by sliding one position at a time in O(n). Learn fixed and variable windo...
2026년 3월 28일 22 min read

[2026] Sliding Window Pattern | Fixed & Variable Subarrays in O(n)

Sliding window algorithm: fixed and variable windows on arrays and strings—max sum, minimum size subarray, longest unique substring, anagrams—with Pytho...
2026년 3월 30일 17 min read

[2026] Time Complexity Optimization Checklist for Coding Interviews | Escape TLE

Reduce time complexity in coding interviews: patterns to convert O(N²) to O(N log N), eliminate duplicate calculations, and data structure selection che...
2026년 3월 28일 22 min read

[2026] Two Pointers Pattern | From O(n²) to O(n) in Arrays

Two pointers algorithm pattern: sorted array pair sums, deduplication, three-sum, and container-with-water—Python examples and complexity notes for codi...
2026년 3월 31일 24 min read

[2026] API Design Complete Guide | REST vs GraphQL vs gRPC Complete Comparison

Compare features and pros/cons of REST API, GraphQL, and gRPC. Detailed explanation of use cases, performance, and developer experience for each API sty...
2026년 3월 30일 17 min read

[2026] AAC Audio Codec: Complete Guide | LC-AAC, HE-AAC & FFmpeg Encoding

AAC profiles (LC-AAC, HE-AAC), MPEG-4 containers, FFmpeg encoding for streaming and mobile—bitrate tiers, sample rates, and practical quality tradeoffs.
2026년 3월 30일 18 min read

[2026] AAC vs MP3 vs Opus Audio Codec Comparison | Quality, Bitrate, Compatibility Complete Guide

Compare AAC, MP3, and Opus audio codecs: quality, bitrate efficiency, latency, and licensing. Learn codec selection for streaming, voice, and podcasts w...
2026년 3월 30일 16 min read

[2026] MP3 Audio Codec in Practice | LAME, CBR, VBR & FFmpeg Encoding

MP3 history and MPEG-1 Layer III, LAME-based CBR and VBR, FFmpeg examples—balance quality and size when compatibility comes first.
2026년 3월 30일 18 min read

[2026] Opus Audio Codec Next-Generation Standard | WebRTC, Low Latency, FFmpeg Practical Complete Guide

IETF standard Opus: voice/music modes, SILK/CELT hybrid, low-latency real-time communication, and FFmpeg encoding. Master the next-generation royalty-fr...