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How to Solve Count Items Matching a Rule Problem
Master the Count Items Matching a Rule LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Easy#1773
LeetCode ProblemCount Items Matching a Rule
You are given an array items, where each items[i] = [typei, colori, namei] describes the type, color, and name of the ith item. You are also given a rule represented by two strings, ruleKey and ruleValue. The ith item is said to match the rule if one of the following is true: Return the number of items that match the given rule.
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Problem Breakdown
Understanding the Count Items Matching a Rule Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given an array items, where each items[i] = [typei, colori, namei] describes the type, color, and name of the ith item. You are also given a rule represented by two strings, ruleKey and ruleValue. The ith item is said to match the rule if one of the following is true: Return the number of items that match the given rule.
Examples
# Example 1
Input
items = [["phone","blue","pixel"],["computer","silver","lenovo"],["phone","gold","iphone"]], ruleKey = "color", ruleValue = "silver"
Output
1
# Example 2
Input
items = [["phone","blue","pixel"],["computer","silver","phone"],["phone","gold","iphone"]], ruleKey = "type", ruleValue = "phone"
Output
2
Constraints
1 <= items.length <= 104
1 <= typei.length, colori.length, namei.length, ruleValue.length <= 10
ruleKey is equal to either "type", "color", or "name".
All strings consist only of lowercase letters.
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Solve Count Items Matching a Rule — You are given an array items, where each items[i] = [typei, colori, namei] descr...
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Frequently Asked Questions
Common questions about solving Count Items Matching a Rule and using PhantomCodeAI during coding interviews.
How does PhantomCodeAI help with LeetCode problems during a coding interview?
PhantomCodeAI reads the problem from a screenshot or listens to it via audio, then generates a complete solution with a step-by-step approach and time/space complexity, so you can focus on explaining your reasoning rather than getting stuck on implementation.
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Does PhantomCodeAI work with HackerRank, CodeSignal, and CoderPad?
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Can PhantomCodeAI handle follow-up questions and modifications?
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Should I still practice these problems on my own first?
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