# 조합으로 푸는 방법 from itertools import combinations def solution (number) : cnt = 0 for i in combinations(number,3) : if sum(i) == 0 : cnt += 1 return cnt # 3중 for문을 이용해 푸는 방법 def solution(number): ln, cnt = len(number), 0 for i in range(ln-2): for j in range(i+1, ln-1): for z in range(j+1, ln): if number[i]+number[j]+number[z] == 0: cnt+= 1 return cnt
