LeetCode 1319: Number of Operations to Make Network Connected Solution
Master LeetCode problem 1319 (Number of Operations to Make Network Connected), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
1319. Number of Operations to Make Network Connected
Problem Explanation
Explanation
To solve this problem, we can use a graph-based approach. We need to find the number of connected components in the given network. If there are k connected components, we need at least k-1 cables to connect all the components. If we have more cables than k-1, we can use the extra cables to connect the remaining components. If we don't have enough cables, it is not possible to connect all computers.
- Build an adjacency list representation of the network connections.
- Use Depth First Search (DFS) to find the number of connected components.
- Return the result based on the number of components and available cables.
- Time complexity: O(N + E), where N is the number of computers and E is the number of connections.
- Space complexity: O(N + E) for storing the adjacency list.
Solution Code
class Solution {
public int makeConnected(int n, int[][] connections) {
if (connections.length < n - 1) return -1;
List<List<Integer>> adjList = new ArrayList<>();
for (int i = 0; i < n; i++) {
adjList.add(new ArrayList<>());
}
for (int[] connection : connections) {
adjList.get(connection[0]).add(connection[1]);
adjList.get(connection[1]).add(connection[0]);
}
boolean[] visited = new boolean[n];
int components = 0;
for (int i = 0; i < n; i++) {
if (!visited[i]) {
components++;
dfs(i, adjList, visited);
}
}
return components - 1;
}
private void dfs(int node, List<List<Integer>> adjList, boolean[] visited) {
visited[node] = true;
for (int neighbor : adjList.get(node)) {
if (!visited[neighbor]) {
dfs(neighbor, adjList, visited);
}
}
}
}Try It Yourself
Loading code editor...
Related LeetCode Problems
Frequently Asked Questions
How to solve LeetCode 1319 (Number of Operations to Make Network Connected)?
This page provides optimized solutions for LeetCode problem 1319 (Number of Operations to Make Network Connected) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.
What is the time complexity of LeetCode 1319 (Number of Operations to Make Network Connected)?
The time complexity for LeetCode 1319 (Number of Operations to Make Network Connected) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.
Can I run code for LeetCode 1319 on DevExCode?
Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 1319 in Java, C++, or Python.