求 hack

#include<bits/stdc++.h>
using namespace std;
const int N=100010;
int n,r[N];
vector<int> v;
inline int read(){
	int x=0,f=1;
	char c=getchar();
	while(c<'0'||c>'9'){
		if(c=='-')f=-1;
		c=getchar();
	}
	while(c>='0'&&c<='9'){
		x=x*10+c-'0';
		c=getchar();
	}
	return x*f;
}
int main(){
	n=read();
	for(int i=1;i<=n;i++)r[i]=read();
	sort(r+1,r+1+n);
	int ans=n;
	for(int i=1;i<=n;i++){
		if(!v.empty()&&r[i]>v[0]){
			ans--;
			v.erase(v.begin());
		}
		v.push_back(r[i]);
	} 
	cout<<ans;
	return 0;
}