#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,sum0=0,sum1=0,c;
	for(int i=0;i<n;++i)
	{
		cin>>c;
		if(c==1) sum1++;
		if(c==0) sum0++;
	}
	if(sum1==sum0) {
		cout<<sum1<<endl;
		return 0;
	}
	else if(sum1>sum0 && sum0>0) {
		cout<<sum0<<endl;
		return 0;
	}
	else if(sum1<sum0 && sum1>0) {
		cout<<sum1<<endl;
		return 0;
	}
	else 
	{
		cout<<0;
		return 0;
	}
	return 0;
}

五个WA，其他TLE