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๐ฒ์๋ผ๋๋์ฒญ๋
[๋ฐฑ์ค] ๋์ 1 ํ์ด์ฌ ํ์ด(DP) ๋ณธ๋ฌธ
๋ฐ์ํ

https://www.acmicpc.net/problem/2293
์ฒ์์ ๋ฐฑํธ๋ํน์ผ๋ก ํ์ด๋ณด์๊ณ , ๊ทธ๋ค์์๋ stack์ ์ด์ฉํด์ ํ์ด๋ณด์์ง๋ง ๋๋ค, ์๊ฐ์ด๊ณผ, ๋๋ ๋ฉ๋ชจ๋ฆฌ ์ด๊ณผ๊ฐ ๋์ด ๋ง์๋์ง ์ด์จ๋์ง ์ ์๊ฐ ์์๋ค.
๋ฐฑํธ๋ํน์ผ๋ก ํ์ด ๋ณธ ํ์ด
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def main():
N, goal = map(int,input().split())
coin = []
for i in range(N):
coin.append(int(input()))
coin = sorted(coin, reverse = True )
cnt = 0
# print(coin)
def do(money_sum, index):
nonlocal cnt
if index < len(coin):
temp = 0
while 1:
if(money_sum + coin[index]*temp==goal):
cnt +=1
break
elif(money_sum + coin[index]*temp<goal):
do(money_sum+coin[index]*temp, index+1)
temp +=1
else:
break
do(0,0)
print(cnt)
if __name__ == "__main__":
main()
|
cs |
์คํ์ ์ด์ฉํด์ ํ์ด๋ณธ ํ์ด
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def main():
N, goal = map(int,input().split())
coin = []
for i in range(N):
coin.append(int(input()))
coinstack = [0]
cnt =0
for num in coin:
# print(num)
coinstack, cnt =addto(coinstack, num, goal, cnt)
print(cnt)
def addto(coinstack, num, goal,cnt):
newstack = []
while coinstack:
currsum = coinstack.pop(0)
temp = 0
while 1:
if(currsum + num*temp==goal):
cnt +=1
break
elif(currsum + num*temp<goal):
newstack.append(currsum + num*temp)
temp +=1
else:
break
# print(newstack, cnt)
return newstack, cnt
if __name__ == "__main__":
main()
|
cs |
๊ทธ๋์๋ค๋ฅธ ์ฌ๋์๋ธ๋ก๊ทธ๋ฅผ ์ฐธ๊ณ ํ์ฌ dp๋ก ํธ๋ ๋ฐฉ๋ฒ์ ์ดํดํ๊ณ , dp๋ก ํ์ด๋ณด์๋ค.
https://marades.tistory.com/5 (์ฐธ๊ณ ํ ๋ธ๋ก๊ทธ)
๋ด๊ฐ ๋ณธ dp์ค์ ๊น๋ค๋ก์ด ํธ์ ์ํ๋ ๊ฒ ๊ฐ๋ค.
์ ๋ต ํ์ด
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import sys
def main():
N, goal = map(int,sys.stdin.readline().split())
coins = []
for _ in range(N):
coins.append(int(sys.stdin.readline()))
dp = [0 for _ in range(goal+1)]
dp[0] = 1
for coin in coins:
for i in range(coin, goal+1):
dp[i] += dp[i-coin]
print(dp[goal])
if __name__ == "__main__":
main()
|
cs |
๋ฐ์ํ
'์๊ณ ๋ฆฌ์ฆ ๋ฌธ์ ํ์ด' ์นดํ ๊ณ ๋ฆฌ์ ๋ค๋ฅธ ๊ธ
[๋ฐฑ์ค] 9095๋ฒ, 1,2,3 ๋ํ๊ธฐ(๋ค์ด๋๋ฏน ํ๋ก๊ทธ๋๋ฐ) (0) | 2020.05.19 |
---|---|
[๋ฐฑ์ค] ๋์ 2 python (0) | 2019.12.05 |
[๋ฐฑ์ค] ๋ฏธ๋ก์ฐพ๊ธฐ ํ์ด์ฌ(Q2178) (0) | 2019.11.29 |
[๋ฐฑ์ค] Q1309 ๋๋ฌผ์ (python , ๋ค์ด๋๋ฏน ํ๋ก๊ทธ๋๋ฐ) (0) | 2019.11.29 |
[๋ฐฑ์ค] Q1309 ์ด์ฝ๋ฆฟ ํ์ด์ฌ (0) | 2019.11.29 |