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two-pointer.md

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๋‘ ํฌ์ธํ„ฐ (two-pointer)

์ž‘์„ฑ์ž : ๊ถŒํ˜์ง„, ์œค๊ฐ€์˜

Table of Contents

์ตœ์žฅ ์ฆ๊ฐ€ ๋ถ€๋ถ„์ˆ˜์—ด ์•Œ๊ณ ๋ฆฌ์ฆ˜

์•„๋ž˜์˜ ์ž๋ฃŒ์—์„œ ์ž์„ธํ•œ ์„ค๋ช…๊ณผ ์ฝ”๋“œ๋ฅผ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

LIS ์™„์ „ํƒ์ƒ‰ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ตฌํ˜„ โ–ถ๏ธ lis_brute.cpp

LIS ๋™์ ๊ณ„ํš๋ฒ• ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ตฌํ˜„ โ–ถ๏ธ lis_dp.cpp

LIS ์ด๋ถ„ํƒ์ƒ‰ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ตฌํ˜„ โ–ถ๏ธ lis_bs.cpp


์ตœ์žฅ ๊ฐ์†Œ ๋ถ€๋ถ„์ˆ˜์—ด ์•Œ๊ณ ๋ฆฌ์ฆ˜

์•„๋ž˜์˜ ์ž๋ฃŒ์—์„œ ์ž์„ธํ•œ ์„ค๋ช…๊ณผ ์ฝ”๋“œ๋ฅผ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

LDS ์ด๋ถ„ํƒ์ƒ‰ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ตฌํ˜„ โ–ถ๏ธ LDS_bs.cpp


ํˆฌ ํฌ์ธํ„ฐ ์•Œ๊ณ ๋ฆฌ์ฆ˜

์•„๋ž˜์˜ ์ž๋ฃŒ์—์„œ ์ž์„ธํ•œ ์„ค๋ช…๊ณผ ์ฝ”๋“œ๋ฅผ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

ํˆฌ ํฌ์ธํ„ฐ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ตฌํ˜„ โ–ถ๏ธ two_pointer.cpp

ํŠน์ง•

  • ๋ฐฐ์—ด์ด ์ •๋ ฌ๋˜์–ด์žˆ๋‹ค๋ฉด O(n)์˜ ์‹œ๊ฐ„๋ณต์žก๋„๋ฅผ ๊ฐ€์ง€๋ฉฐ, ๊ทธ๋ ‡์ง€ ์•Š์„ ๊ฒฝ์šฐ O(logn)์˜ ๋ณต์žก๋„๋ฅผ ๊ฐ€์ง„๋‹ค.