#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
cin >> n;
string s;
int ans = 0;
for (int i = 1; i <= n; i ++){
cin >> s;
int d = 0;
for (int j = 0; j < s.size(); j ++){
d = (d * 10 + (s[j] - '0')) % 90;
}
if ( d == 0 ) ans ++;
}
cout << ans;
return 0;
}
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