<h1>
Frank_6 !!!
</h1>

<h4>笔记</h4>
<h6>log: https://hlcoding.com/blog/share/content/8606/</h6> <h6>__int128:  https://hlcoding.com/blog/share/content/8520/</h6> <h6>sort:   https://hlcoding.com/blog/share/content/8428/</h6> <h6>join-find: https://hlcoding.com/blog/share/content/8211/</h6> <h6>dijsktra: https://hlcoding.com/blog/share/content/8210/</h6> <h6>spfa:  https://hlcoding.com/blog/share/content/8209/</h6> <h6>list: https://hlcoding.com/blog/share/content/8208/</h6>
<h2><a href = "https://www.luogu.com.cn/problem/P1248">推荐一个题目luogu P1248</a> </h2>

```cpp
// 模拟 + 函数 + 暴力枚举
#include <iostream>
using namespace std;
int n;
int is_primes(int ty) {
    int sum = 0;
    for (int i = 2; i < ty; i ++ ) if (ty % i == 0) sum += i;
    return sum + 1;
}
int main() {
    cin >> n;
    // cout << is_primes(220) << " " << is_primes(284);
    for (int i = n; ; i ++ ) {
        int b = is_primes(i);
        if (i == is_primes(b) && i != b) {
            cout << i << " " << b;
            return 0;
        }
    }
    return 0;
}
                                            
```

Frank_6 !!!

笔记

log: https://hlcoding.com/blog/share/content/8606/

__int128: https://hlcoding.com/blog/share/content/8520/

sort: https://hlcoding.com/blog/share/content/8428/

join-find: https://hlcoding.com/blog/share/content/8211/

dijsktra: https://hlcoding.com/blog/share/content/8210/

spfa: https://hlcoding.com/blog/share/content/8209/

list: https://hlcoding.com/blog/share/content/8208/

推荐一个题目luogu P1248

// 模拟 + 函数 + 暴力枚举
#include <iostream>
using namespace std;
int n;
int is_primes(int ty) {
    int sum = 0;
    for (int i = 2; i < ty; i ++ ) if (ty % i == 0) sum += i;
    return sum + 1;
}
int main() {
    cin >> n;
    // cout << is_primes(220) << " " << is_primes(284);
    for (int i = n; ; i ++ ) {
        int b = is_primes(i);
        if (i == is_primes(b) && i != b) {
            cout << i << " " << b;
            return 0;
        }
    }
    return 0;
}

—— 本文来自火龙信奥（义乌睿码科技）：义乌青少年信息学奥赛与编程教育平台，专注 CSP-J/S、NOIP、GESP 竞赛培训，线上线下融合教学，助力编程升学。网址：hlcoding.com

zcy