C417 Verification Completed Completely Correct

Last night, Tang Haodong was certain he had pocketed the USB drive containing crucial data for disproving the N.P. conjecture. But upon waking, it was nowhere to be found. Between then and this morning, he had only been in contact with Natasha. Surely the USB couldn't have sprouted wings and flown away?

In a rush, Tang Haodong bolted from the bedroom to the bathroom. Natasha was there