C++ 代码

#include<iostream>
#include<cstring>
#include<algorithm> 
using namespace std;
int a,s1,s2;
int main()
{
    int i,x;
    cin>>a;
    for (int i=1;i<=a;i++)
    {
        cin>>x;
        if (x>=10&&x<=20) s1++;
            else s2++;
    }
    cout<<s1<<" in";
    cout<<endl;
    cout<<s2<<" out";
}