View Code of Problem 3857

#include<stdio.h>
#include<cmath>
#include<cstdlib>
#include<algorithm>
#include<iostream>
using namespace std;
typedef long long ll;
int main(){

    int t,n,i,a[10000];
	scanf("%d",&t);
	while(t--){
		int cnt=0;
		scanf("%d", &n);
		for(i=0;i<n;i++){
			scanf("%d",&a[i]);
		}
	     for(i=0;i<n;i++){
	     	while(a[i]>0){
	     		int t=a[i]%10;
	     		a[i]/=10;
	     		if(t==2) cnt++;
			 }
		 } 
		 printf("%d\n",cnt);
    }
	return 0; 
}