#E00522. 字符串匹配

字符串匹配

输入 nn 和 nn 个字符串，将相同的字符串两两配对，输出无法配对的字符串数量

n≤100n\leq 100

7
hello, world
c coding camp
archdevil
computing
archdevil
hello, world
c coding camp

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