import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		StringBuilder sb = new StringBuilder();
		while (0 < t--) {
		    char[] tmp = sc.next().toCharArray();
		    int n = tmp.length;
		    int[] arr = new int[n];
    		for (int i = 0; i < n; i++) {
    		    arr[i] = tmp[i] - '0';
    		}
    		for (int i = n - 1; i >= 0; i--) {
    		    for (int j = 0; j < i; j++) {
    		        arr[j] = calc(arr[j], arr[j + 1]);
    		    }
    		}
    		sb.append(arr[0]).append("\n");
		}
		System.out.print(sb);
	}
	
	static int calc(int x, int y) {
	    int ans = x + y;
	    return ans / 10 + ans % 10;
	}
}