Matrix Determinant

vector < vector <int> > cutVector(vector < vector <int> > b,int i,int j) {
            vector < vector <int> > temp;
            int k=0;
            for (int l=0;l<b.size();l++) {
                if (l==i) continue;
                temp.push_back(vector<int>());
                for (int o=0;o<b[l].size();o++) {
                    if (o==j) continue;
                    temp[k].push_back(b[l][o]);
                }
                k++;
            }
            return temp;
}
int matrixDeterminant(int n,vector < vector <int> > b) {
        if (n==1) return b[0][0];
        int c=0;
            for (int j=0;j<b[0].size();j++) {
                int m=((j%2==0)?1:-1);
                c+=m*b[j][0]*matrixDeterminant(n-1,cutVector(b,j,0));
            }
        return c;
}