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A11255. Tom Riddle's Diary

编程题 普及/提高-

题目描述

Harry Potter is on a mission to destroy You-Know-Who's Horcruxes. The first Horcrux that he encountered in the Chamber of Secrets is Tom Riddle's diary. The diary was with Ginny and it forced her to open the Chamber of Secrets. Harry wants to know the different people who had ever possessed the diary to make sure they are not under its influence.

He has names of $n$ people who possessed the diary in order. You need to tell, for each person, if he/she possessed the diary at some point before or not.

Formally, for a name $s_{i}$ in the $i$ -th line, output "YES" (without quotes) if there exists an index $j$ such that $s_{i}=s_{j}$ and $j<i$ , otherwise, output "NO" (without quotes).

输入格式

First line of input contains an integer $n$ ( $1<=n<=100$ ) — the number of names in the list.

Next $n$ lines each contain a string $s_{i}$ , consisting of lowercase English letters. The length of each string is between $1$ and $100$ .

输出格式

Output $n$ lines each containing either "YES" or "NO" (without quotes), depending on whether this string was already present in the stream or not.

You can print each letter in any case (upper or lower).

输入输出样例

输入 #1
6
tom
lucius
ginny
harry
ginny
harry
输出 #1
NO
NO
NO
NO
YES
YES
输入 #2
3
a
a
a
输出 #2
NO
YES
YES

说明/提示

In test case $1$ , for $i=5$ there exists $j=3$ such that $s_{i}=s_{j}$ and $j<i$ , which means that answer for $i=5$ is "YES".
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