The number of distinct eigenvalues of the matrix

$$A=\begin{bmatrix} 2&2&3&3\\0&1&1&1\\0&0&3&3\\0&0&0&2 \end{bmatrix}$$

is equal to ____________.

Diagonal elements of Upper Triangular Matrix i.e. 2,1,3,2 Distinct elements are 1,2,3 Ans is 3