## Editorial for DMOPC '17 Contest 2 P0 - Secrets

Remember to use this editorial

**only**when stuck, and**not to copy-paste code from it**. Please be respectful to the problem author and editorialist.**Submitting an official solution before solving the problem yourself is a bannable offence.**Author:

The distance between two points and on a coordinate grid is . We can apply this formula to the distance between the agents and the shady person, and check if it's less than or equal to .

**Time Complexity:**

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