@[zhangjunx](/user/945790) hack
```
5
9 1 8 3 6
```
正确答案 1
by xiaoming007 @ 2023-07-01 13:35:23
原因是 同一个 $a_z$ 只需要被统计一次。
by xiaoming007 @ 2023-07-01 13:35:49
@[zhangjunx](/user/945790)
```cpp
#include <bits/stdc++.h>
using namespace std;
int a[10000], cnt;
bool f[10100];
int main() {
int n;
cin >> n;
for (int i = 0; i < n; i++)
cin >> a[i];
for (int z = 0; z < n; z++)
for (int i = 0; i < n && !f[z]; i++) {
for (int j = 0; j < i && !f[z]; j++) {
if (a[i] + a[j] == a[z])
cnt++, f[z] = 1;
}
}
cout << cnt;
return 0;
}
```
by xiaoming007 @ 2023-07-01 13:41:59
好的，谢谢~
by han_bai @ 2023-07-01 14:56:05