hiho week 251 register

Ended

Participants:96

Verdict:Accepted
Score:100 / 100
Submitted:2019-04-21 10:52:07

Lang:G++

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#include<iostream>
using namespace std;
int main()
{
    int n;cin>>n;
    bool a[n+5];
    for(int i=1;i<=n;++i)
        a[i]=true;
    for(int i=2;i<n;++i)
        if(a[i])
            for(int j=2;i*j<n;++j)
                a[i*j]=false;
    for(int i=1;i<n/2;++i)
        if(a[i]&&a[n-i])
        {
            cout<<i<<" "<<n-i;
            break;
        }
    return 0;
}
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