In vast country like india its virtually impossible to test entire population hence we need to develop a solution which derives a risk score for public based on their exposure to infected people over a specificed period of duration. If the exposure is above a threshold limit specified by goverment then person will have to take test.
Purpose of the problem definition is to come up with a scoring mechasim based on intersection and exposure with infected person path.
Ideal scoring mechanism would quantify the level of exposure a person have had with infected person. ( Note the exposure has no upper bound )