LeetCode 1773: Count Items Matching a Rule Solution
Master LeetCode problem 1773 (Count Items Matching a Rule), 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.
Problem Explanation
Explanation:
To solve this problem, we need to iterate through the given items array and count the number of items that match the given rule based on the ruleKey and ruleValue. We can simply compare the ruleKey and ruleValue with the corresponding values in each item to determine if it matches the rule.
- Initialize a counter to keep track of the number of items that match the rule.
- Iterate through each item in the items array.
- For each item, check if the ruleKey matches "type", "color", or "name" and compare the ruleValue with the corresponding value in the item.
- If a match is found, increment the counter.
- Finally, return the counter as the result.
Time Complexity:
The time complexity of this solution is O(n), where n is the number of items in the given array.
Space Complexity:
The space complexity is O(1) as we are using a constant amount of extra space.
:
Solution Code
class Solution {
public int countMatches(List<List<String>> items, String ruleKey, String ruleValue) {
int count = 0;
for (List<String> item : items) {
if ((ruleKey.equals("type") && ruleValue.equals(item.get(0))) ||
(ruleKey.equals("color") && ruleValue.equals(item.get(1))) ||
(ruleKey.equals("name") && ruleValue.equals(item.get(2)))) {
count++;
}
}
return count;
}
}Try It Yourself
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