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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAXN 256
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int bucket[MAXN];
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int main()
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{
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int t;
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scanf("%d",&t);
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int tmp;
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for(int i=0;i<t;i++)
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{
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scanf("%d",&tmp);
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if(bucket[tmp]==0)
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{
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++bucket[tmp];
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printf("%d ",tmp);
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}
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}
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printf("\n");
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return 0;
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}
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