1 solutions

  • 0
    @ 2022-3-9 0:19:50

    dfs

    #include <bits/stdc++.h>
    using namespace std;
    int n;
    vector<int>v;
    int prime[1000000],opt;
    bool s[100010000];
    bool fff(int x){
    	if(x==1||x==0) return 0;
    	for(int i=2;i*i<=x;i++){
    		if(x%i==0) return 0;
    	}
    	return 1;
    }
    void dfs(int sum,int now){
    	if(sum==n){
    		for(int i:v){
    			cout<<i;
    		}
    		printf("\n");
    		return ;
    	}
    	for(int i=1;i<=9;i++){
    		if(fff(now*10+i)){
    			v.push_back(i);
    			dfs(sum+1,now*10+i);
    			v.pop_back();
    		}
    	}
    }
    int main(){
    	cin>>n;
    	dfs(0,0);
    	return 0;
    }
    • 1

    Information

    ID
    1279
    Time
    1000ms
    Memory
    128MiB
    Difficulty
    9
    Tags
    # Submissions
    22
    Accepted
    4
    Uploaded By