我一次性AC这道题,用时10分钟
#include<iostream>
using namespace std;
int main()
{
//freopen("xxx.in","r",stdin);
//freopen("yyy.out","w",stdout);
int N;
long long X;
cin >> N;
int out=0,in=0;
for(int i=1;i<=N;i++)
{
cin >> X;
if(X>=10 && X<=20)
in++;
else
out++;
}
cout << in << " in" << '\n';
cout << out << " out";
//fclose(stdin);
//fclose(stdout);
return 0;
}