J1Yun
ZU-TECHLOG
J1Yun
์ „์ฒด ๋ฐฉ๋ฌธ์ž
์˜ค๋Š˜
์–ด์ œ
  • ๐Ÿ“‘ Category (135)
    • Algorithm (61)
      • ๐Ÿ“š Concept (6)
      • ๐Ÿ“˜ Baekjoon Judge (53)
      • ๐Ÿ“— Programmers (2)
    • Computer Science (42)
      • ๐Ÿ”’ Operating System (14)
      • ๐Ÿ“ก Network (15)
      • ๐Ÿ’พ Database (8)
      • ๐Ÿงฉ Design Pattern (4)
      • ๐Ÿ”‘ Security (1)
    • Activities (12)
      • ๐Ÿฆ ๋ฉ‹์Ÿ์ด์‚ฌ์ž์ฒ˜๋Ÿผ 9๊ธฐ (6)
      • ๐Ÿ’ป SW๋งˆ์—์ŠคํŠธ๋กœ 13๊ธฐ (6)
    • Infra (1)
      • โ˜๏ธ AWS (1)
    • Languages (1)
      • ๐Ÿ’™ Python (1)
    • Backend (7)
      • ๐Ÿ”ต Django (4)
      • ๐ŸŸข Node.js (3)
    • Ect. (8)
      • ๐Ÿ’ฌ Talk (0)
      • ๐Ÿ—‚๏ธ ๊ฐœ๋ฐœ์ง๊ตฐ ์ทจ์—… ์ค€๋น„์ž๋ฃŒ (8)

๋ธ”๋กœ๊ทธ ๋ฉ”๋‰ด

  • ํ™ˆ
  • ํƒœ๊ทธ
  • ๋ฐฉ๋ช…๋ก

๊ณต์ง€์‚ฌํ•ญ

์ธ๊ธฐ ๊ธ€

์ตœ๊ทผ ๋Œ“๊ธ€

์ตœ๊ทผ ๊ธ€

ํ‹ฐ์Šคํ† ๋ฆฌ

250x250
hELLO ยท Designed By ์ •์ƒ์šฐ.
J1Yun

ZU-TECHLOG

[BOJ] ๋ฐฑ์ค€ 10844๋ฒˆ ์‰ฌ์šด ๊ณ„๋‹จ ์ˆ˜ - ํŒŒ์ด์ฌ(Python)
Algorithm/๐Ÿ“˜ Baekjoon Judge

[BOJ] ๋ฐฑ์ค€ 10844๋ฒˆ ์‰ฌ์šด ๊ณ„๋‹จ ์ˆ˜ - ํŒŒ์ด์ฌ(Python)

728x90

๋ฌธ์ œ

45656์ด๋ž€ ์ˆ˜๋ฅผ ๋ณด์ž.

์ด ์ˆ˜๋Š” ์ธ์ ‘ํ•œ ๋ชจ๋“  ์ž๋ฆฌ์˜ ์ฐจ์ด๊ฐ€ 1์ด๋‹ค. ์ด๋Ÿฐ ์ˆ˜๋ฅผ ๊ณ„๋‹จ ์ˆ˜๋ผ๊ณ  ํ•œ๋‹ค.

N์ด ์ฃผ์–ด์งˆ ๋•Œ, ๊ธธ์ด๊ฐ€ N์ธ ๊ณ„๋‹จ ์ˆ˜๊ฐ€ ์ด ๋ช‡ ๊ฐœ ์žˆ๋Š”์ง€ ๊ตฌํ•ด๋ณด์ž. 0์œผ๋กœ ์‹œ์ž‘ํ•˜๋Š” ์ˆ˜๋Š” ๊ณ„๋‹จ์ˆ˜๊ฐ€ ์•„๋‹ˆ๋‹ค.

์ž…๋ ฅ

์ฒซ์งธ ์ค„์— N์ด ์ฃผ์–ด์ง„๋‹ค. N์€ 1๋ณด๋‹ค ํฌ๊ฑฐ๋‚˜ ๊ฐ™๊ณ , 100๋ณด๋‹ค ์ž‘๊ฑฐ๋‚˜ ๊ฐ™์€ ์ž์—ฐ์ˆ˜์ด๋‹ค.

์ถœ๋ ฅ

์ฒซ์งธ ์ค„์— ์ •๋‹ต์„ 1,000,000,000์œผ๋กœ ๋‚˜๋ˆˆ ๋‚˜๋จธ์ง€๋ฅผ ์ถœ๋ ฅํ•œ๋‹ค.

 

https://www.acmicpc.net/problem/10844

 

10844๋ฒˆ: ์‰ฌ์šด ๊ณ„๋‹จ ์ˆ˜

์ฒซ์งธ ์ค„์— ์ •๋‹ต์„ 1,000,000,000์œผ๋กœ ๋‚˜๋ˆˆ ๋‚˜๋จธ์ง€๋ฅผ ์ถœ๋ ฅํ•œ๋‹ค.

www.acmicpc.net

 

๐Ÿ’ก ํ’€์ด ๋ฐ ์ฝ”๋“œ

n = int(input())
d = [[0] * 10 for _ in range(n)]

d[0] = [0, 1, 1, 1, 1, 1, 1, 1, 1, 1]
for i in range(1, n):
    d[i][0] = d[i-1][1] 
    d[i][9] = d[i-1][8] 
    for j in range(1, 9):
        d[i][j] = (d[i-1][j-1] + d[i-1][j+1]) % 1000000000

print(sum(d[n-1])% 1000000000)

0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ๊ฐ๊ฐ์€ ์ธ์ ‘ํ•ด ์žˆ๋Š” ์ˆ˜์™€ ๊ฒฐํ•ฉ๋˜์–ด์•ผ ํ•˜๋ฏ€๋กœ, ์ดˆ๊ธฐ n=1์ผ ๋•Œ ๊ณ„๋‹จ ์ˆ˜์˜ ๊ฐœ์ˆ˜๋Š” ๋ฏธ๋ฆฌ ์ง€์ •ํ•œ ํ›„ ๊ธธ์ด i์— ๋Œ€ํ•ด ๋‹ค์Œ๊ณผ ๊ฐ™์€ ์ ํ™”์‹์„ ์„ธ์šธ ์ˆ˜ ์žˆ๋‹ค.

  • i = 0 d[i][0] = d[i-1][1]
  • i = 9 d[i][9] = d[i-1][8]
  • i = j(1~8) d[i][j] = d[i-1][j-1] + d[i-1][j+1]

 

โ€ป ์ด์ค‘๋ฆฌ์ŠคํŠธ ์ดˆ๊ธฐํ™”

  • ์ž˜๋ชป๋œ ํ‘œํ˜„
d = [[0] * 10] * n  # ์ถœ๋ ฅ์€ ๋˜์ง€๋งŒ ๋ฐฑ์ค€์—์„œ ์˜ค๋ฅ˜
  • ์ •ํ™•ํ•œ ํ‘œํ˜„
d = [[0] * 10 for _ in range(n)]

 

728x90

'Algorithm > ๐Ÿ“˜ Baekjoon Judge' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€

[BOJ] ๋ฐฑ์ค€ 14501๋ฒˆ ํ‡ด์‚ฌ - ํŒŒ์ด์ฌ(Python)  (0) 2021.10.06
[BOJ] ๋ฐฑ์ค€ 11052๋ฒˆ ์นด๋“œ ๊ตฌ๋งคํ•˜๊ธฐ - ํŒŒ์ด์ฌ(Python)  (0) 2021.10.06
[BOJ] ๋ฐฑ์ค€ 2156๋ฒˆ ํฌ๋„์ฃผ ์‹œ์‹ - ํŒŒ์ด์ฌ(Python)  (0) 2021.09.15
[BOJ] ๋ฐฑ์ค€ 1932๋ฒˆ ์ •์ˆ˜ ์‚ผ๊ฐํ˜• - ํŒŒ์ด์ฌ(Python)  (0) 2021.09.14
[BOJ] ๋ฐฑ์ค€ 2579๋ฒˆ ๊ณ„๋‹จ ์˜ค๋ฅด๊ธฐ - ํŒŒ์ด์ฌ(Python)  (0) 2021.09.14
    'Algorithm/๐Ÿ“˜ Baekjoon Judge' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€์ด๋‹ค
    • [BOJ] ๋ฐฑ์ค€ 14501๋ฒˆ ํ‡ด์‚ฌ - ํŒŒ์ด์ฌ(Python)
    • [BOJ] ๋ฐฑ์ค€ 11052๋ฒˆ ์นด๋“œ ๊ตฌ๋งคํ•˜๊ธฐ - ํŒŒ์ด์ฌ(Python)
    • [BOJ] ๋ฐฑ์ค€ 2156๋ฒˆ ํฌ๋„์ฃผ ์‹œ์‹ - ํŒŒ์ด์ฌ(Python)
    • [BOJ] ๋ฐฑ์ค€ 1932๋ฒˆ ์ •์ˆ˜ ์‚ผ๊ฐํ˜• - ํŒŒ์ด์ฌ(Python)
    J1Yun
    J1Yun
    ๊ฐœ๋ฐœ ๊ด€๋ จ ๊ธฐ์ˆ  ๋ฐ ๊ณต๋ถ€ ๋‚ด์šฉ ๊ธฐ๋ก์žฅ

    ํ‹ฐ์Šคํ† ๋ฆฌํˆด๋ฐ”