@[疯狂小源](/space/show?uid=105996)
```
#include<bits/stdc++.h>
using namespace std;
int a[101],n,s,i,j,k,ok;
int main()
{
scanf("%d",&n);
for(i=1;i<=n;i++)
scanf("%d",&a[i]);
for(i=1;i<=n;i++)
{
ok=0;
for(j=1;j<=n-1;j++)
for(k=j+1;k<=n;k++)
{
if(a[k]+a[j]==a[i])
{
ok=1;
}
}
s+=ok;
}
printf("%d",s);
return 0;
}
```
by wenzhang @ 2018-10-16 20:58:22
数据大点就超时了
by Shui_Dream @ 2018-10-16 21:28:35
@[疯狂小源](/space/show?uid=105996) 你学一下课程E，用前撮合
by Shui_Dream @ 2018-10-16 21:29:31