poj 2140 Herd Sums

参考：https://blog.csdn.net/yzl_rex/article/details/7875065

https://blog.csdn.net/oranges_c/article/details/53396646

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 using namespace std;
 5 int in;
 6 int ans(int x)
 7 {
 8     int a=0;
 9     for (int i=1;i<=x/2+1;i++)
10     {
11         int sum=0;
12         for (int j=i;j<=x/2+1;j++)
13         {
14             sum+=j;
15             if (sum==x)
16             {
17                 a++;
18                 break;
19             }
20             if (sum>x)//注意剪枝！
21             {
22                 break;
23             }
24         }
25     }
26     return a;
27 }
28 int main()//能简易模拟时优先用模拟，不要轻易用自己推导的定理！
29 {
30     while (cin>>in)
31     {
32         cout<<ans(in)+1<<endl;
33     }
34 
35     return 0;
36 }