• 七夕超时伴侣套餐~~


    The Double Seventh Festival, on the 7th day of the 7th lunar month, is a traditional festival full of romance. On that day, the God of the Love came to the digital kingdom, and annunciated to the people:
    Notification
                                 Do you want to know who is your fere? You can find him or her by this means:
                           Please add all the factors of your ID-Card-Number, and you can find this is your fere's
                           ID-Card-Number.
    
    
    The factors of a numer N is the numbers,they being small than the number N ,and can being divided exactly by the number N. For example, the number 12 has the factors, such as 1,2,3,4,6.

    Input

    The fist line is the number T (1 <= T <= 500000), indicated the number of the test cases. The next T lines, each line has one integer N( 1 <= N <= 500000), meaning the ID-Card-Number.

    Output

    For each test case, you should output the fere's ID-Card-Number on a line.

    Sample Input

    3
    2
    10
    20
    

    Sample Output

    1
    8
    22
    刚开始想了很多诸如自定义函数,先全定义在搜索,当然,时间长到都无法输入了/摊手/摊手(中了八皇后的毒)
     1 #include <cstdio>
     2 #include <cstring>
     3 int main()
     4 {
     5     int n,m;
     6    while( scanf("%d",&n)!=EOF)
     7   {
     8     while(n--)
     9     {
    10     int sum=0;
    11      scanf("%d",&m);
    12      for(int i=1;i*i<=m;i++) //先直接把循环次数/2
    13      {
    14         if(m%i==0)  
    15         sum+=i+m/i;  //竟然没想到=-= 这样就可以顾及到后面的了
    16         if(i*i==m) 
    17         sum-=i;    //上面那种会多出来的
    18      }
    19       printf("%d
    ",sum-m); //与1对应的
    20     }
    21 
    22   }
    23   return 0;
    24 }
    View Code
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  • 原文地址:https://www.cnblogs.com/XXrll/p/10060808.html
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