@[MXFaiyx080807](/user/518277) 直接暴力水过去
```c++
#include <iostream>
using namespace std;
int main()
{
int n;
cin >> n;
int num[105] = {};
for (int i = 0; i < n; ++i)
cin >> num[i];
int count = 0;
int check[105] = {};
for (int i = 0; i < n; ++i)
for (int j = i + 1; j < n; ++j)
for (int k = 0; k < n; ++k)
if (num[i] + num[j] == num[k] && check[k] == 0)
{
++count;
check[k] = 1;
}
cout << count;
return 0;
}
```
by Jasper08 @ 2022-03-18 19:17:07
@[Jasper08](/user/581830) Thanks
by MaxFantastic @ 2022-03-18 19:19:37