Solving an Equation During Confinement, the World's Defense Systems Changed Their Encryption Overnight

The Heroine Is the Kind of Talent That the Country Must Protect

It can be time travel or fast time travel, preferably a novel in which a fast time travel counterattack occurs, but the opponents are all eliminated by the country. Asking for articles

The Heroine Is Strong, Has a Vest, Has a Lazy Personality, and Has a Noble Status