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fix week5 solutions
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β€Ž3sum/invidam.go.md

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# Complexity
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- Time complexity: $$O(n^2)$$
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- μž…λ ₯ λ°°μ—΄μ˜ 길이 n에 λŒ€ν•˜μ—¬,
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- μž…λ ₯ λ°°μ—΄μ˜ 길이 n에 λŒ€ν•˜μ—¬, `i`, `j와 k`λ₯Ό μˆœνšŒν•œλ‹€.
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- Space complexity: $$O(n)$$
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- μž…λ ₯으둜 λ“€μ–΄μ˜¨ λ°°μ—΄μ˜ 길이 n에 λŒ€ν•˜μ—¬, μƒμ„±ν•˜λŠ” κ²°κ³Ό λ°°μ—΄μ˜ 길이 μ—­μ‹œ 이와 λ™μΌν•˜λ‹€.

β€Žencode-and-decode-strings/invidam.go.md

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# Code
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```go
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const DIVIDE_CHAR_V1 = 'γ„±'
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func encodeV1(strs []string) string {
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ret := strings.Join(strs, string(DIVIDE_CHAR_V1))
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return ret
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# Code
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```go
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const DIVIDE_CHAR = '-'
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func encode(strs []string) string {
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ret := ""
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for _, str := range strs {

β€Žproduct-of-array-except-self/invidam.go.md

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}
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return answer
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}
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```
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```
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# μ—¬λ‹΄
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λΆ€λΆ„κ³±λ¬Έμ œλ‘œ ν•΄κ²°ν•˜κΈ° μ ν•©ν•˜λ‹€λŠ” 생각이 λ“€μ—ˆμœΌλ‚˜, `0`처리 λ•Œλ¬Έμ— μ‹œλ„ν•΄λ³΄μ§„ μ•Šμ•˜λ‹€.
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μ†”λ£¨μ…˜λ“€μ„ 보며 쒌, μš°μ— λŒ€ν•΄ 2λ²ˆμ„ μ‚¬μš©ν•˜λŠ” 방법이 μžˆλ‹€λŠ” κ±Έ μ•Œκ²Œλ˜μ—ˆλ‹€.

β€Žtop-k-frequent-elements/invidam.go.md

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- Time complexity: $$O(nlog(n))$$
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- λ°°μ—΄μ˜ 길이 n에 λŒ€ν•˜μ—¬, μ •λ ¬λΉ„μš©μœΌλ‘œ μ†Œλͺ¨λœλ‹€.
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- Space complexity: $$O(n+m)$$
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- Space complexity: $$O(n+k)$$
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- λ°°μ—΄μ˜ 길이 nκ³Ό μ›μ†Œμ˜ λ²”μœ„ k에 λŒ€ν•˜μ—¬, λΉˆλ„μˆ˜ μ €μž₯을 μœ„ν•΄ μ„ μ–Έν•˜λŠ” λΉ„μš© `k`와 μ •λ ¬λœ μ›μ†Œλ₯Ό μ €μž₯ν•˜λŠ” λΉ„μš© `n`이 μ†Œλͺ¨λœλ‹€.
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# Code

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