2 solutions

  • 1
    @ 2024-8-12 11:21:47
    #include<bits/stdc++.h>
    using namespace std;
    const int N=45;
    int a[N];
    int ans[N],st[N];
    int n;
    void dfs(int u)
    {
    	if(u==n)
    	{
    		if(a[ans[1]+ans[u]]==1)
    		{
    			for(int i=1;i<=n;i++)
    			{
    				cout<<ans[i]<<" ";
    			}
    			cout<<endl;
    		}
    		return ;
    	}
    	for(int i=2;i<=n;i++)
    	{
    		if(st[i]==0&&a[ans[u]+i]==1)
    		{
    			ans[u+1]=i;
    			st[i]=1;
    			dfs(u+1);
    			st[i]=0;
    		}
    	}
    }
    int main()
    {
    	a[2]=a[3]=a[5]=a[7]=a[11]=a[13]=a[17]=a[19]=a[23]=a[29]=a[31]=1; 
    	cin>>n;
    	ans[1]=1;
    	st[1]=1;
    	dfs(1); 
    	return 0;
    }
    

    Information

    ID
    1258
    Time
    1000ms
    Memory
    256MiB
    Difficulty
    7
    Tags
    (None)
    # Submissions
    22
    Accepted
    6
    Uploaded By