#include <stdio.h>
#include <algorithm>
#include <vector>
#include <deque>
#include <string>
#include <iostream>
using namespace std;
using ll = long long;

void solve();
int main() {
	solve();
#ifdef DBG
	while (true);
#endif
}

//432
void solve() {
	int t, len;
	scanf("%d", &t);
	char s[1001];
	for (int tcase = 0; tcase < t; tcase++) {
		scanf("%s", s);
		for (len = 0; s[len] != 0; len++)
			s[len] -= '0';
		for (;1 <= len; len--)
			for (int i = 0; i < (len - 1); i++) {
				s[i] += s[i + 1];
				s[i] = (s[i] % 10) + (s[i] / 10);
			}
		printf("%d\n", s[0]);
	}
}