Question 79
The $2022 \times 2022$ board was cut into tetraminoes of two types: L-tetramino $L$ and Z-tetramino $Z$. Each tetramino consists of four unit squares, tetriminoes can be rotated and flipped.
Find the smallest number of $Z$-tetriminoes that could be obtained.
Find the smallest number of $Z$-tetriminoes that could be obtained.