Problem solved

[harkhanid]

No description provided.

[super30admin]

Find the town Judge (Problem1.java)

Strengths:

• The solution is correct and efficient, with optimal time and space complexity.
• The code is concise and follows a logical approach.
• The comments at the top correctly state the time and space complexity.

Areas for improvement:

• The variable name "indegree" is slightly misleading because it is not just indegree (incoming edges) but a net trust count that also accounts for outgoing trust (by decrementing). A more accurate name might be "trustScore" or "netTrust".
• The code uses indegree[edge[0]-1]-- and indegree[edge[1]-1]++ which correctly adjusts for 0-indexed arrays. However, it's important to note that the problem labels people from 1 to n. This is handled correctly, but the indexing might be confusing to some. Alternatively, you could create an array of size n+1 and index from 1 to n to avoid the constant adjustment, but the current approach is valid and efficient.
• The base case if(n == 0) return -1; is unnecessary because the constraints state that n>=1. However, it doesn't hurt to have it for clarity.
• Consider adding a comment explaining why the net trust count for the judge should be n-1: because the judge has no outgoing trust (so no decrements) and has incoming trust from all others (n-1 increments).

Overall, the solution is excellent. Just minor naming and commenting suggestions.

VERDICT: PASS

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Ball in the Maze (Problem2.java)

Your solution is correct and efficient, with the same time and space complexity as the reference. Well done! Here are a few suggestions for improvement:

1. Variable Naming: Consider using more descriptive variable names. For example, "cordinate" should be spelled "coordinate". Also, "nr" and "nc" are common, but "row" and "col" might be clearer.

2. Initialization of Directions: The dirs array is declared as an instance variable, but it is constant and only used in this method. You can declare it inside the method or as a static final variable to avoid unnecessary instance state.

3. Input Validation: While the problem constraints ensure that the maze has at least 2 empty spaces, it's good practice to check for null inputs. However, the current check for empty maze or zero columns is sufficient.

4. Code Clarity: The while loop that rolls the ball until it hits a wall is correct, but you can add a comment to explain that it moves until it hits a wall or boundary.

5. Modifying Input: Be aware that modifying the input maze might not be acceptable in some contexts. If required, you could use a separate visited array. However, since the reference solution does the same, it's acceptable here.

Overall, your solution is solid. Keep up the good work!

VERDICT: PASS