看不懂你写了什么..
by 聊机 @ 2023-01-12 23:12:11
```cpp
if(a[i]+a[j]==a[j+1])
```
这什么玩意?
by 聊机 @ 2023-01-12 23:12:43
直接给你看正解(我2019年12月写的)吧,不知道你在写什么
```cpp
#include<iostream>
#include<cstdio>
using namespace std;
int t[20005], g[20005];
int n, a[105], ans, i;
int main() {
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
g[a[i]] = 1;
}
for (int i = 1; i < n; i++) {
for (int j = i + 1; j <= n; j++) {
t[a[i] + a[j]]++;
}
}
for (int i = 1; i <= 20002; i++) {
if (t[i] > 0 && g[i]) ans++;
}
cout << ans << endl;
return 0;
}
```
by 聊机 @ 2023-01-12 23:15:10