import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    static int[] counts = new int[10];
    static int[][] dp = new int[10][10];
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            counts[sc.nextInt() % 10]++;
        }
        int ans = 0;
        ans += counts[0];
        for (int i = 1; i < 10; i++) {
            ans += counts[i] / 10 * 10;
            counts[i] %= 10;
        }
        for (int[] arr : dp) {
            Arrays.fill(arr, Integer.MIN_VALUE);
        }
        System.out.println(ans + dfw(9, 0));
    }
    
    static int dfw(int idx, int m) {
        if (idx == 0) {
            if (m == 0) {
                return 0;
            } else {
                return Integer.MIN_VALUE / 2;
            }
        }
        if (dp[idx][m] == Integer.MIN_VALUE) {
            for (int i = 0; i <= counts[idx]; i++) {
                dp[idx][m] = Math.max(dp[idx][m], dfw(idx - 1, (m + idx * i) % 10) + i);
            }
        }
        return dp[idx][m];
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}