프로그래머스 k번째 수

def solution(array, commands):
    result=[]
    for command in commands:
        arr = array
        arr=arr[command[0]-1:command[1]]
        arr.sort()
        result.append(arr[command[2]-1])
    return result
print(solution([1, 5, 2, 6, 3, 7, 4],[[2, 5, 3],[4, 4, 1], [1, 7, 3]]))

https://programmers.co.kr/learn/courses/30/lessons/42748