#README
https://www.hackerrank.com/challenges/bfsshortreach
Inside graph creation...
Graph: {1: [], 2: [], 3: [], 4: []}
Built graph: {1: [2, 3], 2: [1], 3: [1], 4: []}
Queue: deque([1])
Distances: {1: 0, 2: 6}
Distances: {1: 0, 2: 6, 3: 6}
Queue: deque([2, 3])
Queue: deque([3])
Distances: {1: 0, 2: 6, 3: 6}
6 6 -1
Inside graph creation...
Graph: {1: [], 2: [], 3: []}
Built graph: {1: [], 2: [3], 3: [2]}
Queue: deque([2])
Distances: {2: 0, 3: 6}
Queue: deque([3])
Distances: {2: 0, 3: 6}
-1 6