View Code of Problem 3857

#include<stdio.h>

int main(){
	int T;
	scanf("%d",&T);
	while(T--){
		int n;
		scanf("%d",&n);
		int a[n];
		int i,count=0;
		for(i=0;i<n;i++){
			scanf("%d",&a[i]);
		}
		for(i=0;i<n;i++){
			while(a[i]!=0){
				if(a[i]%10==2){
				count++;
				a[i]/=10;
				}
				else a[i]/=10;
			}			
		}
		printf("%d\n",count);
	}
}