GraphConnectivity

Current flight information (the following flights are one-way only, and all the flights available are included below): There is a flight from city N to city M There is a flight from city G to city F There is a flight from city H to city B There is a flight from city B to city I There is a flight from city J to city L There is a flight from city F to city C There is a flight from city H to city N There is a flight from city F to city D There is a flight from city N to city E There is a flight from city G to city J There is a flight from city J to city A There is a flight from city B to city K Question: Is there a series of flights that goes from city G to city K?

Current flight information (the following flights are one-way only, and all the flights available are included below): There is a flight from city A to city K There is a flight from city B to city L There is a flight from city D to city M There is a flight from city B to city H There is a flight from city I to city F There is a flight from city F to city N There is a flight from city A to city G There is a flight from city M to city E There is a flight from city F to city C There is a flight from city D to city A There is a flight from city M to city J There is a flight from city I to city B Question: Is there a series of flights that goes from city D to city C?

Current flight information (the following flights are one-way only, and all the flights available are included below): There is a flight from city C to city H There is a flight from city B to city M There is a flight from city A to city L There is a flight from city D to city A There is a flight from city C to city K There is a flight from city J to city B There is a flight from city A to city I There is a flight from city D to city N There is a flight from city B to city G There is a flight from city J to city C There is a flight from city N to city F There is a flight from city N to city E Question: Is there a series of flights that goes from city J to city L?