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[Baekjoon] 7490. 0 ๋ง๋ค๊ธฐ - python ๋ณธ๋ฌธ
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https://www.acmicpc.net/problem/7490
์ค๊ณ ๋ฐฉ๋ฒ
์ฌ๊ท
sum : ํ์ฌ๊น์ง์ ์ฐ์ฐ๊ฐ
sign : ๋ค์ ์ฐ์ฐ์ num๊ณผ ํจ๊ป ๋ค์ด๊ฐ ์ฐ์ฐ์(+๋ 1๋ก, -๋ -1๋ก ํํ, ๋น์นธ์ด ๋ค์ด๊ฐ๋๋ ๋ฌด์๋ฏธํจ)
num : ๋ค์์ ์ฐ์ฐ๋ ์ซ์
n : ๋ช๋ฒ์งธ ํญ์ธ์ง๋ฅผ ๋ํ๋
string : ํ์ฌ๊น์ง์ ํํ์
์ฝ๋
def recur(sum, sign, num, n, string):
if (n == N):
sum = sum + (sign*num)
if sum == 0:
print(string)
else:
recur(sum ,sign ,num*10+(n+1), n+1, string+' '+str(n+1))
recur(sum+sign*num ,1 ,(n+1), n+1, string+'+'+str(n+1))
recur(sum+sign*num, -1, (n+1), n+1, string+'-'+str(n+1))
test_case = int(input())
for _ in range(test_case):
N = int(input())
recur(0,1,1,1,"1")
print()
์ฐธ๊ณ : https://velog.io/@tks7205/%EB%B0%B1%EC%A4%80-7490-0%EB%A7%8C%EB%93%A4%EA%B8%B0backtracking
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