35 lines
780 B
C++
35 lines
780 B
C++
#include<iostream>
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#include<cstring>
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#include<algorithm>
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#define maxn 100000+5
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using namespace std;
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int mapp[maxn],head[maxn];
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int n;
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int main()
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{
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cin.sync_with_stdio(false);
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int t,casee=1;
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cin>>t;
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while(t--)
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{
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cin>>n;
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memset(mapp,0,sizeof(mapp));
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memset(head,0,sizeof(head));
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int maxx=-1;
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for(int i=0;i<n;i++){int x;cin>>x;mapp[x]++;maxx=max(maxx,x);}
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for(int i=2;i<=maxx;i++)
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{
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for(int j=i;j<=maxx;j+=i)
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{
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if(mapp[j]) head[i]+=mapp[j];
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}
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}
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cout<<"Case #"<<casee++<<": ";
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for(int i=maxx;i>=1;i--)
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{
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if(head[i]>=2) {cout<<i<<endl;break;}
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}
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}
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return 0;
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}
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