#include <bits/stdc++.h>
// #include<bits/extc++.h>
#define endl '\n'
#define eps 1e-7
#define pb push_back
#define eb emplace_back
#define debug(x) cerr<<#x<<": "<<x<<'\n';
// using namespace __gnu_pbds;
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair <ll,ll>;
using pii = pair <int,int>;
using ull = unsigned long long;
const int N = 1e6 + 5, M = 50, MOD = 1e9 + 7;
mt19937_64 rnd (chrono::steady_clock::now().time_since_epoch().count());
int n, ans, a[N], cal[M], tmp[M];
void isac()
{
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i];
    sort(a+1,a+n+1);
    for(int i=1;i<=20;i++) cal[i] = 0;
    ans = 0;
    for(int i=1;i<=n;i++)
    {
        int len = 0;
        int x = a[i];
        for(int j=1;j<=20;j++) tmp[j] = 0;
        while(x)
        {
            tmp[++len] = x%10;
            x /= 10;
        }
        int carry = 0;
        for(int j=1;j<=20;j++)
        {
            int s = tmp[j] + cal[j] + carry;
            cal[j] = s%10;
            carry = s/10;
            if(carry) ans ++;
        }
    }
    cout<<ans<<'\n';
}
int main(void)
{
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    int T = 1;
    cin >> T;
    while (T--) isac();
    return 0;
}
/*
    Zena youth together.
    Such a pretty name.
    There will be a long story.
    Time will tell all.
*/