LeetCode 2206: Divide Array Into Equal Pairs Solution
Master LeetCode problem 2206 (Divide Array Into Equal Pairs), a easy 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.
2206. Divide Array Into Equal Pairs
Problem Explanation
Explanation:
- To divide the array into equal pairs, we need to pair up elements that are equal.
- If the count of each unique element is even, we can pair them up to form valid pairs.
- We can achieve this by counting the occurrences of each element in the array and checking if all counts are even. Solution:
Solution Code
class Solution {
public boolean canDivideIntoPairs(int[] nums) {
Map<Integer, Integer> countMap = new HashMap<>();
for (int num : nums) {
countMap.put(num, countMap.getOrDefault(num, 0) + 1);
}
for (int count : countMap.values()) {
if (count % 2 != 0) {
return false;
}
}
return true;
}
}Try It Yourself
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