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public static List<Integer> matchingStrings(List<String> stringList, List<String> queries) {
// Write your code here
// Use a HashMap to store the frequency of each string in stringList
Map<String, Integer> frequencyMap = new HashMap<>();
// Count occurrences of each string in stringList
for (String str : stringList) {
frequencyMap.put(str, frequencyMap.getOrDefault(str, 0) + 1);
}
// Prepare the result list
List<Integer> result = new ArrayList<>();
// Retrieve frequency for each query
for (String query : queries) {
result.add(frequencyMap.getOrDefault(query, 0));
}
return result;
}
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Sparse Arrays
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