#include <bits/stdc++.h>
using namespace std;
const int LEN=1e5+5;
int n,res=1,ans=1,a[LEN];
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	cin>>n;
	for (int i=1;i<=n;i++)cin>>a[i];
	sort(a+1,a+1+n);
	for (int i=2;i<=n;i++){
		if (a[i]==a[i+1])res++;
		else{
			ans=max(res,ans);
			res=1;
		}
	}
	ans=max(ans,res);
	cout<<ans;
    return 0;
}

为啥洛谷官方数据测100分，CCF显示20分呢

怎么调都调不出20分