[Python] ๋ฐฑ์ค€ 11399 - ATM

2020. 8. 13. 01:54ยทAlgorithm

๋ฌธ์ œ

์ธํ•˜์€ํ–‰์—๋Š” ATM์ด 1๋Œ€๋ฐ–์— ์—†๋‹ค. ์ง€๊ธˆ ์ด ATM์•ž์— N๋ช…์˜ ์‚ฌ๋žŒ๋“ค์ด ์ค„์„ ์„œ์žˆ๋‹ค. ์‚ฌ๋žŒ์€ 1๋ฒˆ๋ถ€ํ„ฐ N๋ฒˆ๊นŒ์ง€ ๋ฒˆํ˜ธ๊ฐ€ ๋งค๊ฒจ์ ธ ์žˆ์œผ๋ฉฐ, i๋ฒˆ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ๊ฑธ๋ฆฌ๋Š” ์‹œ๊ฐ„์€ Pi๋ถ„์ด๋‹ค.

์‚ฌ๋žŒ๋“ค์ด ์ค„์„ ์„œ๋Š” ์ˆœ์„œ์— ๋”ฐ๋ผ์„œ, ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์ด ๋‹ฌ๋ผ์ง€๊ฒŒ ๋œ๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด, ์ด 5๋ช…์ด ์žˆ๊ณ , P1 = 3, P2 = 1, P3 = 4, P4 = 3, P5 = 2 ์ธ ๊ฒฝ์šฐ๋ฅผ ์ƒ๊ฐํ•ด๋ณด์ž. [1, 2, 3, 4, 5] ์ˆœ์„œ๋กœ ์ค„์„ ์„ ๋‹ค๋ฉด, 1๋ฒˆ ์‚ฌ๋žŒ์€ 3๋ถ„๋งŒ์— ๋ˆ์„ ๋ฝ‘์„ ์ˆ˜ ์žˆ๋‹ค. 2๋ฒˆ ์‚ฌ๋žŒ์€ 1๋ฒˆ ์‚ฌ๋žŒ์ด ๋ˆ์„ ๋ฝ‘์„ ๋•Œ ๊นŒ์ง€ ๊ธฐ๋‹ค๋ ค์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์—, 3+1 = 4๋ถ„์ด ๊ฑธ๋ฆฌ๊ฒŒ ๋œ๋‹ค. 3๋ฒˆ ์‚ฌ๋žŒ์€ 1๋ฒˆ, 2๋ฒˆ ์‚ฌ๋žŒ์ด ๋ˆ์„ ๋ฝ‘์„ ๋•Œ๊นŒ์ง€ ๊ธฐ๋‹ค๋ ค์•ผ ํ•˜๊ธฐ ๋•Œ๋ฌธ์—, ์ด 3+1+4 = 8๋ถ„์ด ํ•„์š”ํ•˜๊ฒŒ ๋œ๋‹ค. 4๋ฒˆ ์‚ฌ๋žŒ์€ 3+1+4+3 = 11๋ถ„, 5๋ฒˆ ์‚ฌ๋žŒ์€ 3+1+4+3+2 = 13๋ถ„์ด ๊ฑธ๋ฆฌ๊ฒŒ ๋œ๋‹ค. ์ด ๊ฒฝ์šฐ์— ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์€ 3+4+8+11+13 = 39๋ถ„์ด ๋œ๋‹ค.

์ค„์„ [2, 5, 1, 4, 3] ์ˆœ์„œ๋กœ ์ค„์„ ์„œ๋ฉด, 2๋ฒˆ ์‚ฌ๋žŒ์€ 1๋ถ„๋งŒ์—, 5๋ฒˆ ์‚ฌ๋žŒ์€ 1+2 = 3๋ถ„, 1๋ฒˆ ์‚ฌ๋žŒ์€ 1+2+3 = 6๋ถ„, 4๋ฒˆ ์‚ฌ๋žŒ์€ 1+2+3+3 = 9๋ถ„, 3๋ฒˆ ์‚ฌ๋žŒ์€ 1+2+3+3+4 = 13๋ถ„์ด ๊ฑธ๋ฆฌ๊ฒŒ ๋œ๋‹ค. ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์€ 1+3+6+9+13 = 32๋ถ„์ด๋‹ค. ์ด ๋ฐฉ๋ฒ•๋ณด๋‹ค ๋” ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์„ ์ตœ์†Œ๋กœ ๋งŒ๋“ค ์ˆ˜๋Š” ์—†๋‹ค.

์ค„์„ ์„œ ์žˆ๋Š” ์‚ฌ๋žŒ์˜ ์ˆ˜ N๊ณผ ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ๊ฑธ๋ฆฌ๋Š” ์‹œ๊ฐ„ Pi๊ฐ€ ์ฃผ์–ด์กŒ์„ ๋•Œ, ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์˜ ์ตœ์†Ÿ๊ฐ’์„ ๊ตฌํ•˜๋Š” ํ”„๋กœ๊ทธ๋žจ์„ ์ž‘์„ฑํ•˜์‹œ์˜ค.

 

์ž…๋ ฅ

์ฒซ์งธ ์ค„์— ์‚ฌ๋žŒ์˜ ์ˆ˜ N(1 ≤ N ≤ 1,000)์ด ์ฃผ์–ด์ง„๋‹ค. ๋‘˜์งธ ์ค„์—๋Š” ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ๊ฑธ๋ฆฌ๋Š” ์‹œ๊ฐ„ Pi๊ฐ€ ์ฃผ์–ด์ง„๋‹ค. (1 ≤ Pi ≤ 1,000)

 

์ถœ๋ ฅ

์ฒซ์งธ ์ค„์— ๊ฐ ์‚ฌ๋žŒ์ด ๋ˆ์„ ์ธ์ถœํ•˜๋Š”๋ฐ ํ•„์š”ํ•œ ์‹œ๊ฐ„์˜ ํ•ฉ์˜ ์ตœ์†Ÿ๊ฐ’์„ ์ถœ๋ ฅํ•œ๋‹ค.


์ •๋‹ต

N = int(input())
sum = 0
result = 0

time = list(map(int, input().split()))

time.sort()

for i in range(N):
    sum += time[i]
    result += sum

print(result)

์ฐธ๊ณ 

ํŒŒ์ด์ฌ์€ sort()ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•ด ๊ฐ„๋‹จํ•˜๊ฒŒ ์ •๋ ฌ์„ ํ•  ์ˆ˜ ์žˆ๋‹ค.

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