LeetCode 950: Reveal Cards In Increasing Order Solution
Master LeetCode problem 950 (Reveal Cards In Increasing Order), 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.
950. Reveal Cards In Increasing Order
Problem Explanation
Explanation:
To solve this problem, we can simulate the process of revealing cards using a deque data structure. We first sort the input deck in increasing order. Then, we iterate through the sorted deck in reverse order. At each step, we pop a card from the back of the deque and push it to the front. Then, we pop the last card from the deque and push it to the front. This process simulates the revealing of cards in the required order.
Time Complexity:
The time complexity of this approach is O(NlogN) due to the sorting of the deck, where N is the number of cards in the deck.
Space Complexity:
The space complexity is O(N) to store the sorted deck and the deque.
:
Solution Code
import java.util.Arrays;
import java.util.Deque;
import java.util.LinkedList;
class Solution {
public int[] deckRevealedIncreasing(int[] deck) {
Arrays.sort(deck);
Deque<Integer> deque = new LinkedList<>();
for (int i = deck.length - 1; i >= 0; i--) {
if (!deque.isEmpty()) {
deque.addFirst(deque.pollLast());
}
deque.addFirst(deck[i]);
}
int[] result = new int[deck.length];
int idx = 0;
for (int num : deque) {
result[idx++] = num;
}
return result;
}
}Try It Yourself
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