#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int main() {
	int t;
	cin >> t;
	
	REP(i, t) {
		string s;
		cin >> s;
		
		vector<int> v(s.size());
		REP(j, s.size()) v[j] = s[j] - '0';
		
		while (v.size() > 1) {
			vector<int> now(v.size() - 1);
			REP(j, v.size() - 1) {
				now[j] = v[j] + v[j + 1];
				if (now[j] >= 10) now[j] = now[j] / 10 + now[j] % 10;
			}
			v = now;
		}
		
		printf("%d\n", v[0]);
	}
	return 0;
}