https://programmers.co.kr/learn/courses/30/lessons/12981?language=python3
def solution(n, words):
answer = []
# [실행] 버튼을 누르면 출력 값을 볼 수 있습니다.
print('Hello Python')
for i in range(len(words)):
words[i] = tuple(words[i])
print(words)
s = set()
s.add(words[0])
for i in range(1, len(words)):
if(words[i-1][-1] != words[i][0] or words[i] in s):
answer.append(i%n+1)
answer.append((i//n)+1)
print("문제 : ",i)
break
s.add(words[i])
print(s)
if(len(answer) ==0):
answer.append(0)
answer.append(0)
return answer