36 lines
703 B
C++
36 lines
703 B
C++
#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <sstream>
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using namespace std;
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int cnt[1005];
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int main()
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{
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int n,tmp;
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while(scanf("%d",&n)==1&&n!=0)
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{
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memset(cnt,0,sizeof(int)*1005);
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for(int i=0;i<n;i++)
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{
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scanf("%d",&tmp);
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++cnt[tmp];
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}
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int c=0;
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ostringstream ostr;
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for(int i=0;i<1005;i++)
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{
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if(cnt[i])
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{
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++c;
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ostr<<i<<" ";
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}
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}
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printf("%d\n",c);
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string ans=ostr.str();
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ans.replace(ans.begin()+ans.size()-1,ans.end(),"\0");
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printf("%s\n\n",ans.c_str());
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}
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return 0;
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}
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