import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Scanner;

class Main {
	public static void main(String[] args) throws Exception {
		new Main().run();
	}
	
	void run() {
		Scanner sc=new Scanner(System.in);
		int T=sc.nextInt();
		for(int t=0;t<T;++t) {
			ArrayDeque<Integer> dq=new ArrayDeque<>();
			char[] cs=sc.next().toCharArray();
			for(int i=0;i<cs.length;++i) {
				dq.addLast((int)(cs[i]-'0'));
			}
			while(dq.size()>1) {
				int n=dq.size();
				for(int i=0;i<n-1;++i) {
					int v=dq.pollFirst();
					int nv=v+dq.peekFirst();
					nv=nv%10+nv/10;
					dq.addLast(nv);
				}
				dq.pollFirst();
			}
			System.out.println(dq.poll());
		}
	}
	
	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
	
}