문제 코드 def solution(N, number): if N == number: return 1 answer = -1 arr = [set() for _ in range(8)] for i in range(len(arr)): arr[i].add(int(str(N)*(i+1))) for i in range(1,8): for j in range(i): for op1 in arr[j]: for op2 in arr[i-j-1]: arr[i].add(op1+op2) arr[i].add(op1-op2) arr[i].add(op1*op2) if op2 != 0: arr[i].add(op1//op2) if number in arr[i]: answer = i+1 break return answer 풀이방법 이 문제는 동..