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const int N = 205;
// gets matrix values from user
void get_matrix (int M[][N],int m, int n)
{
int i;
int j;
i=0;
while (i<m)
{
j=0;
while (j<n) {
M[i][j] = getint();
j=j+1;
}
i=i+1;
}
}
// prints matrix of mXn
void print_matrix (int M[][N],int m, int n)
{
int i;
int j;
int temp;
i=0;
while (i<m) //go over columns
{
j=0;
while (j<n) //go over rows
{
putint(M[i][j]);
putch(32);
j=j+1;
}
putch(10);
i=i+1;
}
}
int powfff(int n, int times) {
int i;
int res;
if (times == 0) {
return 1;
}
i=0;
res = n;
while(i<times-1){
res = res*n;
i=i+1;
}
return res;
}
void GetSubmatrix(int M[][N],int submatrix[][N],int n,int neglect_line)
{
int i;
int j;
int k;
i=0;
while(i<n-1)
{
j=0;
k=0;
while(j<n-1)
{
if(k!=neglect_line)
{
submatrix[i][j]=M[i+1][k];
j=j+1;
}
k=k+1;
}
i=i+1;
}
}
int CalculateMatrix(int M[][N],int submatrix[][N],int m, int n)
{
int i;
int sum;
int submatrix_value;
sum = 0;
if(n==2)
{
return M[0][0]*M[1][1]-M[1][0]*M[0][1];
}
else
{
i = 0;
while(i<n)
{
GetSubmatrix(M,submatrix,n,i);
submatrix_value=CalculateMatrix(submatrix,submatrix, n-1, n-1);
sum=sum + powfff(-1,i) * M[0][i] * submatrix_value;
i=i+1;
}
return sum;
}
}
int main()
{
int n;
int m;
int result;
int M[N][N];
int submatrix[N][N];
m=getint();
n=getint();
get_matrix (M,m,n); //get matrix from user
print_matrix(M,m,n); //print matrix
result = CalculateMatrix(M, submatrix, m,n);
putint(result);
return 0;
}
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