View Code of Problem 3857

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		int t=scanner.nextInt();
		while(t-->0) {
			int n=scanner.nextInt();
			int ans=0;
			for(int i=0;i<n;i++) {
				int s=scanner.nextInt();
				if(s==2) {
					ans++;
				}
			}
			System.out.println(ans);
		
			
		}
	}

}