LeetCode 3207: Maximum Points After Enemy Battles Solution
Master LeetCode problem 3207 (Maximum Points After Enemy Battles), 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.
Problem Explanation
Explanation:
To solve this problem, we can iterate through the enemy energies and keep track of the maximum points we can achieve by making optimal choices. We can use a greedy approach where we choose the unmarked enemy with the highest energy that we can defeat with our current energy.
- Sort the enemy energies in non-increasing order.
- Iterate through the sorted enemy energies:
- If our current energy is greater than or equal to the enemy's energy, we defeat the enemy and gain 1 point.
- Otherwise, we increase our energy by defeating marked enemies until we can defeat the current enemy.
- Return the total points obtained.
Time complexity: O(n log n) due to sorting the enemy energies. Space complexity: O(1) as we are using only a constant amount of extra space.
:
Solution Code
import java.util.Arrays;
class Solution {
public int maxPoints(int[] enemyEnergies, int currentEnergy) {
Arrays.sort(enemyEnergies);
int points = 0;
for (int enemy : enemyEnergies) {
if (currentEnergy >= enemy) {
points++;
currentEnergy -= enemy;
} else {
break;
}
}
return points;
}
}Try It Yourself
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What is the time complexity of LeetCode 3207 (Maximum Points After Enemy Battles)?
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