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Merge pull request border-studygroup#41 from whansoo/develop
Done Today's Coding Test (day5)
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# ๐Ÿฆ„[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค]๋‚˜์ด ์ถœ๋ ฅ - ์ˆ˜ํ•™,๋ฐฐ์—ด
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<br/>
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### ๐Ÿงก๋ฌธ์ œ ์„ค๋ช…
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๋จธ์“ฑ์ด๋Š” 40์‚ด์ธ ์„ ์ƒ๋‹˜์ด ๋ช‡ ๋…„๋„์— ํƒœ์–ด๋‚ฌ๋Š”์ง€ ๊ถ๊ธˆํ•ด์กŒ์Šต๋‹ˆ๋‹ค. ๋‚˜์ด age๊ฐ€ ์ฃผ์–ด์งˆ ๋•Œ, 2022๋…„์„ ๊ธฐ์ค€ ์ถœ์ƒ ์—ฐ๋„๋ฅผ return ํ•˜๋Š” solution ํ•จ์ˆ˜๋ฅผ ์™„์„ฑํ•ด์ฃผ์„ธ์š”.
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***
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### ๐Ÿ’›์ œํ•œ์‚ฌํ•ญ
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- 0 < age โ‰ค 120
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- ๋‚˜์ด๋Š” ํƒœ์–ด๋‚œ ์—ฐ๋„์— 1์‚ด์ด๋ฉฐ 1๋…„๋งˆ๋‹ค 1์”ฉ ์ฆ๊ฐ€ํ•ฉ๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’š์ž…์ถœ๋ ฅ ์˜ˆ
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| age | result |
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|:---------|:---------|
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| 40 | 1983 |
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| 23 | 2000 |
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***
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### ๐Ÿ’™์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช…
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์ž…์ถœ๋ ฅ #1
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- 2022๋…„ ๊ธฐ์ค€ 40์‚ด์ด๋ฏ€๋กœ 1983๋…„์ƒ์ž…๋‹ˆ๋‹ค.
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์ž…์ถœ๋ ฅ #2
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- 2022๋…„ ๊ธฐ์ค€ 23์‚ด์ด๋ฏ€๋กœ 2000๋…„์ƒ์ž…๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’œ๋‚˜์˜ ํ’€์ด
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```javascript
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function solution(age) {
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var answer = 2022- age + 1;
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return answer;
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}
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```
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# ๐Ÿฆ„[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค]๋ฐฐ์—ด ๋’ค์ง‘๊ธฐ - ์ˆ˜ํ•™,๋ฐฐ์—ด
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<br/>
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### ๐Ÿงก๋ฌธ์ œ ์„ค๋ช…
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์ •์ˆ˜๊ฐ€ ๋“ค์–ด ์žˆ๋Š” ๋ฐฐ์—ด num_list๊ฐ€ ๋งค๊ฐœ๋ณ€์ˆ˜๋กœ ์ฃผ์–ด์ง‘๋‹ˆ๋‹ค. num_list์˜ ์›์†Œ์˜ ์ˆœ์„œ๋ฅผ ๊ฑฐ๊พธ๋กœ ๋’ค์ง‘์€ ๋ฐฐ์—ด์„ returnํ•˜๋„๋ก solution ํ•จ์ˆ˜๋ฅผ ์™„์„ฑํ•ด์ฃผ์„ธ์š”.
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***
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### ๐Ÿ’›์ œํ•œ์‚ฌํ•ญ
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- 1 โ‰ค num_list์˜ ๊ธธ์ด โ‰ค 1,000
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- 0 โ‰ค num_list์˜ ์›์†Œ โ‰ค 1,000
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***
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### ๐Ÿ’š์ž…์ถœ๋ ฅ ์˜ˆ
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| num_list | result |
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|:---------|:---------|
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| [1,2,3,4,5] | [5,4,3,2,1] |
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| [1,1,1,1,1,2] | [2,1,1,1,1,1] |
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| [1,0,1,1,1,3,5] | [5,3,1,1,1,0,1] |
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***
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### ๐Ÿ’™์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช…
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์ž…์ถœ๋ ฅ #1
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- num_list๊ฐ€ [1, 2, 3, 4, 5]์ด๋ฏ€๋กœ ์ˆœ์„œ๋ฅผ ๊ฑฐ๊พธ๋กœ ๋’ค์ง‘์€ ๋ฐฐ์—ด [5, 4, 3, 2, 1]์„ returnํ•ฉ๋‹ˆ๋‹ค.
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์ž…์ถœ๋ ฅ #2
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- num_list๊ฐ€ [1, 1, 1, 1, 1, 2]์ด๋ฏ€๋กœ ์ˆœ์„œ๋ฅผ ๊ฑฐ๊พธ๋กœ ๋’ค์ง‘์€ ๋ฐฐ์—ด [2, 1, 1, 1, 1, 1]์„ returnํ•ฉ๋‹ˆ๋‹ค.
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์ž…์ถœ๋ ฅ #3
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- num_list๊ฐ€ [1, 0, 1, 1, 1, 3, 5]์ด๋ฏ€๋กœ ์ˆœ์„œ๋ฅผ ๊ฑฐ๊พธ๋กœ ๋’ค์ง‘์€ ๋ฐฐ์—ด [5, 3, 1, 1, 1, 0, 1]์„ returnํ•ฉ๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’œ๋‚˜์˜ ํ’€์ด
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```javascript
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function solution(num_list) {
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let answer = [];
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for(i=0; i<num_list.length; i++) {
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answer.unshift(num_list[i]);
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}
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return answer;
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}
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//shift, unshift๊ฐ€ ์•ˆ์ข‹๋‹ค ํ•˜์—ฌ pushํ˜•์‹์œผ๋กœ ๋ฐ”๊ฟˆ..
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function solution(num_list) {
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let answer = [];
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for(let i = num_list.length - 1; i >= 0; i--) {
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answer.push(num_list[i]);
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}
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return answer;
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}
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//shift, unshift๋Š” pop,push๋ณด๋‹ค ๋А๋ฆฌ๋‹ค.pop,push๋Š” ๋งจ๋’ค์˜ ์ธ๋ฑ์Šค ์ž๋ฆฌ์—์„œ ๋„ฃ๊ณ  ๋นผ๊ธฐ๋งŒ ํ•˜๋ฉด ๋˜๋Š”๋ฐ shift,unshift๋Š” ๊ธฐ์กด์˜ ์žˆ์—ˆ๋˜ ์ž๋ฆฌ์—์„œ ํ•œ์นธ์”ฉ
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// ์˜†์œผ๋กœ ์˜ฎ๊ฒจ์•ผ ํ•œ๋‹ค ๊ทธ๋ž˜์„œ ๊ทธ๋ƒฅ ๊ทธ์ž๋ฆฌ์—์„œ ์ง€์šฐ๊ฑฐ๋‚˜ ๋„ฃ์„ ์ˆ˜ ์žˆ๋Š” pop,push๋ณด๋‹ค ๋А๋ฆฌ๋‹ค.
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```
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# ๐Ÿฆ„[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค]์•„์ด์Šค ์•„๋ฉ”๋ฆฌ์นด๋…ธ - ์ˆ˜ํ•™,๋ฐฐ์—ด
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### ๐Ÿงก๋ฌธ์ œ ์„ค๋ช…
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๋จธ์“ฑ์ด๋Š” ์ถ”์šด ๋‚ ์—๋„ ์•„์ด์Šค ์•„๋ฉ”๋ฆฌ์นด๋…ธ๋งŒ ๋งˆ์‹ญ๋‹ˆ๋‹ค. ์•„์ด์Šค ์•„๋ฉ”๋ฆฌ์นด๋…ธ๋Š” ํ•œ์ž”์— 5,500์›์ž…๋‹ˆ๋‹ค. ๋จธ์“ฑ์ด๊ฐ€ ๊ฐ€์ง€๊ณ  ์žˆ๋Š” ๋ˆ money๊ฐ€ ๋งค๊ฐœ๋ณ€์ˆ˜๋กœ ์ฃผ์–ด์งˆ ๋•Œ, ๋จธ์“ฑ์ด๊ฐ€ ์ตœ๋Œ€๋กœ ๋งˆ์‹ค ์ˆ˜ ์žˆ๋Š” ์•„๋ฉ”๋ฆฌ์นด๋…ธ์˜ ์ž” ์ˆ˜์™€ ๋‚จ๋Š” ๋ˆ์„ ์ˆœ์„œ๋Œ€๋กœ ๋‹ด์€ ๋ฐฐ์—ด์„ return ํ•˜๋„๋ก solution ํ•จ์ˆ˜๋ฅผ ์™„์„ฑํ•ด๋ณด์„ธ์š”.
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***
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### ๐Ÿ’›์ œํ•œ์‚ฌํ•ญ
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- 0 < money โ‰ค 1,000,000
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***
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### ๐Ÿ’™์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช…
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์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช… #1
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- 5,500์›์€ ์•„์ด์Šค ์•„๋ฉ”๋ฆฌ์นด๋…ธ ํ•œ ์ž”์„ ์‚ด ์ˆ˜ ์žˆ๊ณ  ์ž”๋ˆ์€ 0์›์ž…๋‹ˆ๋‹ค.
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์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช… #2
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- 15,000์›์€ ์•„์ด์Šค ์•„๋ฉ”๋ฆฌ์นด๋…ธ ๋‘ ์ž”์„ ์‚ด ์ˆ˜ ์žˆ๊ณ  ์ž”๋ˆ์€ 4,000์›์ž…๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’œ๋‚˜์˜ ํ’€์ด
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```javascript
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function solution(money) {
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let result = []
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let a = Math.floor(money/5500)
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let b = money%5500
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result.push(a,b)
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return result
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}
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```
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# ๐Ÿฆ„[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค]์˜ท๊ฐ€๊ฒŒ ํ• ์ธ ๋ฐ›๊ธฐ - ์ˆ˜ํ•™,๋ฐฐ์—ด
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### ๐Ÿงก๋ฌธ์ œ ์„ค๋ช…
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๋จธ์“ฑ์ด๋„ค ์˜ท๊ฐ€๊ฒŒ๋Š” 10๋งŒ ์› ์ด์ƒ ์‚ฌ๋ฉด 5%, 30๋งŒ ์› ์ด์ƒ ์‚ฌ๋ฉด 10%, 50๋งŒ ์› ์ด์ƒ ์‚ฌ๋ฉด 20%๋ฅผ ํ• ์ธํ•ด์ค๋‹ˆ๋‹ค.
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๊ตฌ๋งคํ•œ ์˜ท์˜ ๊ฐ€๊ฒฉ price๊ฐ€ ์ฃผ์–ด์งˆ ๋•Œ, ์ง€๋ถˆํ•ด์•ผ ํ•  ๊ธˆ์•ก์„ return ํ•˜๋„๋ก solution ํ•จ์ˆ˜๋ฅผ ์™„์„ฑํ•ด๋ณด์„ธ์š”.
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***
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### ๐Ÿ’›์ œํ•œ์‚ฌํ•ญ
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- 10 โ‰ค price โ‰ค 1,000,000
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- price๋Š” 10์› ๋‹จ์œ„๋กœ(1์˜ ์ž๋ฆฌ๊ฐ€ 0) ์ฃผ์–ด์ง‘๋‹ˆ๋‹ค.
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- ์†Œ์ˆ˜์  ์ดํ•˜๋ฅผ ๋ฒ„๋ฆฐ ์ •์ˆ˜๋ฅผ returnํ•ฉ๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’™์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช…
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์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช… #1
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- 150,000์›์—์„œ 5%๋ฅผ ํ• ์ธํ•œ 142,500์›์„ return ํ•ฉ๋‹ˆ๋‹ค.
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์ž…์ถœ๋ ฅ ์˜ˆ ์„ค๋ช… #2
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- 580,000์›์—์„œ 20%๋ฅผ ํ• ์ธํ•œ 464,000์›์„ return ํ•ฉ๋‹ˆ๋‹ค.
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***
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### ๐Ÿ’œ๋‚˜์˜ ํ’€์ด
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```javascript
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function solution(price) {
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//if๋ฌธ์„ ์จ์„œ ๊ทธ ์กฐ๊ฑด์— ๋งž์„ ๋•Œ๋งˆ๋‹ค return์„ ๋ฐ›๋Š”๋‹ค
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if (500000 <= price) {
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const c = Math.floor(price - (price * 0.2))
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return c
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}if (300000 <= price) {
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const b = Math.floor(price - (price * 0.1))
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return b
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}
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if (100000 <= price) {
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const a = Math.floor(price - (price * 0.05))
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return a
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}
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return price
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}
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```

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