代码如下

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	string s;
	cin>>s;
	int s2,s0,s1,s4;
	for(int i=0;i<n;i++){
		if(s[i]=='2'){
			s2++;
		}
		if(s[i]=='0'){
			s0++;
		}
		if(s[i]=='1'){
			s1++;
		}
		if(s[i]=='4'){
			s4++;
		}
	}
	if(s2==s1&&s1==s0&&s0==s4&&s4==s2&&s1==s4&&s2==s0){
		cout<<"Yes";
	}else cout<<"No";
	return 0;
}