43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
#include<cstdio>
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#include<cstring>
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#include<algorithm>
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using namespace std;
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const int MAXN = 100010;
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const long long INF = 1LL<<62;
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int A[MAXN],B[MAXN];
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int main()
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{
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int n;
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while(~scanf("%d",&n))
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{
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for(int i=0;i<n;i++)
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scanf("%d",&A[i]);
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for(int i=0;i<n;i++)
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scanf("%d",&B[i]);
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sort(A,A+n);
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sort(B,B+n);
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long long ans=-INF;
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int ka=lower_bound(A,A+n,0)-A;
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int kb=lower_bound(B,B+n,0)-B;
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int d1=min(n-ka,kb);
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int a1=n-1,b1=d1-1;
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for(int cnt=0;cnt<d1;cnt++)
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{
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ans=max(ans,(long long)A[a1--]*B[b1--]);
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}
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int d2=min(ka,n-kb);
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int a2=d2-1,b2=n-1;
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for(int cnt=0;cnt<d2;cnt++)
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{
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ans=max(ans,(long long)A[a2--]*B[b2--]);
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}
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a1=n-1-d1,b1=d1;
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for(int cnt=0;cnt<n-d1-d2;cnt++)
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{
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ans=max(ans,(long long)A[a1--]*B[b1++]);
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}
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printf("%I64d\n",ans);
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}
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return 0;
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}
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