Mashas little brother draw point sheet paper after draw circle give sheet sister Masha return geometry lesson instantly notice interesting fact brother drawingAt line go point brother draw do not intersect touch circleAlso circle intersect touch pair circle circle locate inside anotherMoreover circle Masha draw square minimal area side parallel axis circle locate inside square notice square intersect touch pair square square locate inside othernow Masha want draw circle minimal possible radius go point brother draw do not intersect circle circle touch Mashas circle locate inside itits guarantee answer will not exceed 1012 it hold hack