#include<iostream>
using namespace std;
int n,m,ans1,ans2; 
int main(){
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		int a;
		cin >> a;
		if(a) ans1++;
		else ans2++;
	}
	for(int i = 1; i <= m; i++){
		int u,v;
		cin >> u >> v;
	}
	cout << min(ans1,ans2);
}