View Code of Problem 3857

#include <stdio.h>
#include <string.h> 
#include <math.h>	
int main(void)
{
	int t,count,i;
	scanf("%d",&t);
	while(t--){
		int n;
		count=0;
		scanf("%d",&n);
		int a;
		for(i=0;i<n;i++){
			scanf("%d",&a);
			if(a==2){
				count++;
			}
		}
		printf("%d\n",count);
	}
	return 0;
 }