C++ :

#include <bits/stdc++.h>
using namespace std;
int g;
long long a[10];
long long b[10] = {0, 1, 10, 100, 1000, 10000, 100000, 1000000};
int main()
{
	cin >> g;
	while (g--) {
		for (int i = 1; i <= 7; i++) 
			cin >> a[i];
		for (int i = 1; i < 7; i++) {
			while (a[i]-10>=9) {
				a[i] -= 10;
				a[i+1]++;
			}
		}
//		for(int i=1;i<=7;i++)
//			cout<<a[i]<<" ";
//		cout<<endl; 
		long long sum = 0;
		long long ans = -1;
		for (int i = 1; i <= 7; i++) {
			sum += a[i]*b[i];
			if (a[i] < 9) {
				ans = sum+1;
				break;
			}
		}
		if (ans == -1) ans = sum+1;
		cout << ans << endl;
	}
	return 0;
}