import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		int[][] arr = new int[t][];
		for (int i = 0; i < t; i++) {
		    String line = sc.next();
		    arr[i] = new int[line.length()];
		    for (int j = 0; j < line.length(); j++) {
		        arr[i][j] = line.charAt(j) - '0';
		    }
		}
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < t; i++) {
		    for (int j = 0; j < arr[i].length - 1; j++) {
		        for (int k = 0; k < arr[i].length - j - 1; k++) {
		            int x = arr[i][k] + arr[i][k + 1];
		            arr[i][k] = x / 10 + x % 10;
		        }
		    }
		    sb.append(arr[i][0]).append("\n");
		}
		System.out.print(sb);
	}
}