language: C/C++11 (O2)
length:481B
time:15ms
score:40pts
code:
#include <bits/stdc++.h>
#define MOD 998244353
#define mod 1000000007
using namespace std;
int main()
{
	int n,sum = 0,flag = 1,j = 0;
	cin >> n;
	string s;
	for (int i = 1; i <= n; i++)
	{
	    cin >> s;
	    flag = 1;
	    j = 0;
	    while (s[j] != '#')
	    {
	        if (s[j] != ' ')
	        {
	            flag = 0;
	            break;
            }
        }
        if (flag && s[j + 1] == ' ') sum++;
    }
    cout << sum << endl;
	return 0;
}