Submission #3566004

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Source Code Expand

n = int(input())
w = [input() for i in range(n)]
flag = 1
for i in range(n):
  for j in range(n):
    if i == j:
      continue
    if w[i] == w[j]:
      flag = flag *0
      break
for i in range(n):
  if i == 0:
    continue
  if w[i-1][-1] == w[i][0]:
    flag = flag * 1
  else:
    flag = flag * 0
    
if flag == 1:
  print("Yes")
else:
  print("No")

Submission Info

Judge Result