@[Sherry2023](/user/933437) 可以给一下数据范围吗？
by ___Furina___ @ 2024-04-05 08:03:41
太谢大大，我已AC，代码如下
```
#include <bits/stdc++.h>
using namespace std;
int a[405], n, ans = 0;
int main(){
memset(a, 0, sizeof(a));
cin >> n;
for(int i = 0; i < n; i++)
{
int t;
cin >> t;
a[t + 200]++;
}
for(int i = 0; i <= 400; i++)
{
ans = max(ans, a[i]);
}
for(int i = 1; i <= 400; i++)
{
for(int j = 0; j <= 400; j++)
{
int k = 0;
while(j + k * i <= 400 && a[j + k * i] > 0)
{
k++;
ans = max(ans, k);
}
}
}
cout << ans;
return 0;
}
```
by Czenzi_QianXi @ 2024-04-05 14:02:21