import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final int T = sc.nextInt();
		for(int tt = 0; tt < T; tt++){
			final char[] inputs = sc.next().toCharArray();
			
			int[] curr = new int[inputs.length];
			for(int i = 0; i < inputs.length; i++){
				curr[i] = Character.getNumericValue(inputs[i]);
			}
			
			for(int length = curr.length; length >= 1; length--){
				for(int i = 0; i < length - 1; i++){
					curr[i] = (curr[i] + curr[i + 1]) % 10 + (curr[i] + curr[i + 1]) / 10;
				}
			}
			
			System.out.println(curr[0]);
		}
		
	}

}