Tr A

#include<cstdio>
#include<cstring>
using namespace std;
long long t,n,m;
long long s1[20][20],s2[20][20],s3[20][20];
void f()
{
    long long i,j,k,sum=0;
    m--;
    while (m)
    {
        if (m&1)
        {
            memset(s3,0,sizeof(s3));
            for (i=0;i<n;i++)
            for (j=0;j<n;j++)
            for (k=0;k<n;k++)
            s3[i][j]+=(s1[i][k]*s2[k][j])%9973;
            for (i=0;i<n;i++)
            for (j=0;j<n;j++)
            s2[i][j]=s3[i][j];
        }
        memset(s3,0,sizeof(s3));
        for (i=0;i<n;i++)
        for (j=0;j<n;j++)
        for (k=0;k<n;k++)
        s3[i][j]+=(s1[i][k]*s1[k][j])%9973;
        for (i=0;i<n;i++)
        for (j=0;j<n;j++)
        s1[i][j]=s3[i][j];
        m>>=1;
    }
    for (i=0;i<n;i++) sum+=s2[i][i];
    printf("%lld\n",sum%9973);
}
int main()
{
     long long i,j;
     scanf("%lld",&t);
     while (t--)
     {
         scanf("%lld%lld",&n,&m);
         for (i=0;i<n;i++)
         for (j=0;j<n;j++) {scanf("%lld",&s1[i][j]);s2[i][j]=s1[i][j];}
         f();
     }
}