C1609 It Was Solved

"HEX, no matter what, we have to solve this problem!" Mach said.

"Of course!" HEX nodded his head heavily.

Since there was such a good opportunity to show off, he would not let it slip away easily.

- -

"Da Da Da..."

The tip of the brush collided with the whiteboard, producing a loud rhythmic sound.

Along with this pleasant sound, the number of lines on the whiteboard increased rapidly