Critical Connections in a Network
There are n servers numbered from 0 to n - 1 connected by undirected server-to-server connections forming a network where connections[i] = [ai, bi] represents a connection between...
There are n servers numbered from 0 to n - 1 connected by undirected server-to-server connections forming a network where connections[i] = [ai, bi] represents a connection between servers ai and bi. Any server can reach other servers directly or indirectly through the network.
A critical connection is a connection that, if removed, will make some servers unable to reach some other server.
Return all critical connections in the network in any order.
Example 1
Input: n = 4, connections = [[0,1],[1,2],[2,0],[1,3]]
Output: [[1,3]]
Explanation: [[3,1]] is also accepted.
Example 2
Input: n = 2, connections = [[0,1]]
Output: [[0,1]]
Constraints
- 2 <= n <= 10^5
- n - 1 <= connections.length <= 10^5
- 0 <= ai, bi <= n - 1
- ai != bi
- There are no repeated connections.
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