View Code of Problem 3857

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,t;
	cin>>n;
	while(n--){
		int a[1005] = { };
		cin>>t;
		for(int i = 0;i < t;i++)cin>>a[i];
		sort(a,a+t);
		int num = 0;
		for(int i = 0;i<t;i++){
			if(a[i]>2)break;
			else if(a[i] == 2)num++;
		}
		cout<<num<<endl;
	}
	
	
	
	return 0;
}