def solution(k,list_):
    a=0
    add_list = []
    for i in range(1,len(list_)-1):
        for v in range(1,len(list_)-i):
            a += list_[i-1]
            a += list_[i+v-1]
            a += list_[i+v]
            add_list.append(a)
            a=0
    answer = add_list[-k]
    return answer

print(solution(3,[1,2,3,4,5,6,7,8,9,10]))


개어려운데 알고리즘 학원다녀야되나