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Non_Divisiable_Subset.java
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77 lines (57 loc) · 2.07 KB
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/*
Problem link: https://www.hackerrank.com/challenges/non-divisible-subset/problem
*/
import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
class Result {
/*
* Complete the 'nonDivisibleSubset' function below.
*
* The function is expected to return an INTEGER.
* The function accepts following parameters:
* 1. INTEGER k
* 2. INTEGER_ARRAY s
*/
public static int nonDivisibleSubset(int k, List<Integer> s) {
// Write your code here
ArrayList<ArrayList<Integer>> l = new ArrayList<>();
if(k==1)return 1;
for(int i = 0; i<k ; i++){
l.add(new ArrayList<>());
}
for(int i = 0; i<s.size() ; i++){
l.get(s.get(i)%k).add(s.get(i));
}
int count = l.get(0).size();
for(int i = 1; i<=k/2; i++) {
count += l.get(i).size()>l.get(k-i).size()? l.get(i).size() : l.get(k-i).size();
}
return count;
}
}
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");
int n = Integer.parseInt(firstMultipleInput[0]);
int k = Integer.parseInt(firstMultipleInput[1]);
List<Integer> s = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
.map(Integer::parseInt)
.collect(toList());
int result = Result.nonDivisibleSubset(k, s);
bufferedWriter.write(String.valueOf(result));
bufferedWriter.newLine();
bufferedReader.close();
bufferedWriter.close();
}
}