C :

#include<stdio.h>

int main()
{
	int n,a,i,x=0,y=0;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		scanf("%d",&a);
		if(a>=10&&a<=20)
		{
			x++;
		}
		else
		{
			y++;
		}
	}
	
	printf("%d in\n",x);
	printf("%d out",y);
	
	return 0;
}

C++ :

#include<iostream>

using namespace std;

int main()
{
    int n,N,a=0,b=0;
    
    cin>>n;
    
    for(int i=1;i<=n;i++)
    
{   cin>>N;
    
    if(N>=10&&N<=20)
    
    a++;
    
    else
    
    b++;
}    
    cout<< a <<" in "<<endl;
    cout<< b <<" out "<<endl;


    return 0;
}