Package g0501_0600.s0547_number_of_provinces

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    547 - Number of Provinces.

    Medium

    There are n cities. Some of them are connected, while some are not. If city a is connected directly with city b, and city b is connected directly with city c, then city a is connected indirectly with city c.

    A province is a group of directly or indirectly connected cities and no other cities outside of the group.

    You are given an n x n matrix isConnected where isConnected[i][j] = 1 if the <code>i<sup>th</sup></code> city and the <code>j<sup>th</sup></code> city are directly connected, and isConnected[i][j] = 0 otherwise.

    Return the total number of provinces.

    Example 1:

    Input: isConnected = [1,1,0,1,1,0,0,0,1]

    Output: 2

    Example 2:

    Input: isConnected = [1,0,0,0,1,0,0,0,1]

    Output: 3

    Constraints:

    • 1 &lt;= n &lt;= 200

    • n == isConnected.length

    • n == isConnected[i].length

    • isConnected[i][j] is 1 or 0.

    • isConnected[i][i] == 1

    • isConnected[i][j] == isConnected[j][i]

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer findCircleNum(Array<IntArray> arr)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait