#include <cstdio>
#include <cstring>

#define Nmax 13
#define INF 0x3f3f3f3f
#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))

int n;
int mat[Nmax][Nmax];
int d[Nmax][1 << Nmax], sir[Nmax];;

void solve()
{
    int i, j, ct, nod, mask, mask1, mask2, mask3, sol = INF;

    memset(d, 0x3f, sizeof(d));
    for (i = 1; i <= n; ++i)
    {
    	d[i][0] = 0;
        d[i][1 << (i - 1)] = 0;
    }
    
   	for (mask = 0; mask <= 1 << n; ++mask)
        for (nod = 1; nod <= n; ++nod)
        	if ((1 << (nod - 1)) & mask)
            {
            	ct = 0;
			    for (i = 1; i <= n; ++i)
    				if (i != nod && (1 << (i - 1)) & mask)
			        	sir[++ct] = i;

			    for (i = 1; i <= ct; ++i)
           			for (mask1 = 1; mask1 < 1 << ct; ++mask1)
		            {
           				mask2 = 0;
		                for (j = 1; j <= ct; ++j)
		                	if ((1 << (j - 1)) & mask1)
           			            mask2 += 1 << (sir[j] - 1);
           			    mask3 = mask ^ mask2;

		                d[nod][mask] = min(d[nod][mask], mat[nod][sir[i]] + max(d[sir[i]][mask2], d[nod][mask3]));
		            }
    		}

    printf("%d\n", d[1][(1 << n) - 1]);
}

void citire()
{
	int i, j, t;
    
	scanf("%d\n", &t);
    while (t > 0)
    {
    	scanf("%d\n", &n);
        for (i = 1; i <= n; ++i)
        	for (j = 1; j <= n; ++j)
            	scanf("%d", &mat[i][j]);
        solve();
		--t;
    }
}

int main()
{
	freopen("cast.in", "r", stdin);
    freopen("cast.out", "w", stdout);
    citire();
    return 0;
}