虽然本题A了，但依旧想问此代码为何RE

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<string>
#include<fstream>
#include<map>
#include<stack>
#include<cwchar>
#include<queue>
#include<vector>
using namespace std;
int x[1005];
int main()
{
	int n;
	string s;
	cin>>n>>s;
	for(int i=0;i<=n;i++)
	{
		x[s[i]-'0']++;
	}
	if(x[2]==x[0]&&x[0]==x[1]&&x[1]==x[4]&&x[2]==x[4])
	{
		cout<<"Yes";
	}
	else
	{
		cout<<"No";
	}
	return 0;
}