[Programmers] k의 개수

https://school.programmers.co.kr/learn/courses/30/lessons/120887

프로그래머스

 

 

import collections
def solution(i, j, k):
    num = list(range(i, j+1))
    
    one = []
    for i in num :
        i = str(i)
        one += list(i)
    
    cnt = collections.Counter(one)
    
    return cnt[str(k)]