삼총사→ 조합 + 삼중 for문

나의 풀이

from itertools import combinations
def solution(number):
    cnt=0
    tmp=list(combinations(number, 3))
    for tuple in tmp:
        if sum(tuple) ==0:
            cnt+=1
    
    return cnt

 

 

 

다른 사람의 풀이

def solution(number):
    answer = 0
    l = len(number)
    for i in range(l-2):
        for j in range(i+1, l-1):
            for k in range(j+1, l):
                # print(number[i],number[j],number[k])
                if number[i]+number[j]+number[k] == 0:
                    answer += 1           
    return answer