题解 | 字符串哈希
字符串哈希
https://www.nowcoder.com/practice/dadbd37fee7c43f0ae407db11b16b4bf
n = int(input())
list = []
for i in range(n):
s = input()
if not list:
list.append(s)
elif list and s not in list:
list.append(s)
print(len(list))
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