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数字问题
Time Limit:1000MS Memory Limit:32768K
Description:
给你N个数,其中有几个不同出现了呢?
Input:
每组第一行一个N(1<=N<=10000),第二行N个整数
Output:
出现过的数字数目
Sample Input:
3 2 2 3 4 2 2 3 4
Sample Output:
2 3
Source:
zjut_DD
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