Package g1601_1700.s1640_check_array_formation_through_concatenation

Class Solution

java.lang.Object
g1601_1700.s1640_check_array_formation_through_concatenation.Solution
public class Solution extends java.lang.Object
1640 - Check Array Formation Through Concatenation.

Easy

You are given an array of distinct integers arr and an array of integer arrays pieces, where the integers in pieces are distinct. Your goal is to form arr by concatenating the arrays in pieces in any order. However, you are not allowed to reorder the integers in each array pieces[i].

Return true if it is possible to form the array arr from pieces. Otherwise, return false.

Example 1:

Input: arr = [15,88], pieces = [[88],[15]]

Output: true

Explanation: Concatenate [15] then [88]

Example 2:

Input: arr = [49,18,16], pieces = [[16,18,49]]

Output: false

Explanation: Even though the numbers match, we cannot reorder pieces[0].

Example 3:

Input: arr = [91,4,64,78], pieces = [[78],[4,64],[91]]

Output: true

Explanation: Concatenate [91] then [4,64] then [78]

Constraints:

  • 1 <= pieces.length <= arr.length <= 100
  • sum(pieces[i].length) == arr.length
  • 1 <= pieces[i].length <= arr.length
  • 1 <= arr[i], pieces[i][j] <= 100
  • The integers in arr are distinct.
  • The integers in pieces are distinct (i.e., If we flatten pieces in a 1D array, all the integers in this array are distinct).

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    canFormArray(int[] arr, int[][] pieces)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • canFormArray

      public boolean canFormArray(int[] arr, int[][] pieces)