#include<iostream>
#include<cstring>
using namespace std;

int main(){
    int n;
    cin >> n;
    int x[10] = {};
    for(int i = 0; i < n; i++){
        int a;  cin >> a;
        x[a%10]++;
    }
    int ans = x[0];
    for(int i = 1; i < 10; i++){
        if(x[i]%10) ans += x[i]/10*10, x[i] %= 10;
        else        ans += max(0, x[i]-10), x[i] = min(x[i], 10);
    }
    int dp[1001];
    memset(dp, -1, sizeof(dp));
    dp[0] = 0;
    for(int i = 1; i < 10; i++){
        for(int j = 0; j < x[i]; j++){
            for(int k = 1000-i; k >= 0; k--){
                if(dp[k] == -1) continue;
                dp[k+i] = max(dp[k+i], dp[k]+1);
            }
        }
    }
    int ma = 0;
    for(int i = 0; i < 1000; i += 10)   ma = max(ma, dp[i]);
    cout << ans+ma << endl;
    return 0;
}