View Code of Problem 3857

#include<bits/stdc++.h>
using namespace std;
#define max 50
int main(){
	 int n,m,k;
	 cin>>n;
	 while(n--){
	 	cin>>m; 
	 	int a[3] = { };
	 	for(int i = 0;i<m;i++){
	 		cin>>k;
	 		if(k==2)a[k]++;
		 } 
	 	cout<<a[2]<<endl;
	 }
	return 0;
}