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day80.java
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day80.java
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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 'pickingNumbers' function below.
*
* The function is expected to return an INTEGER.
* The function accepts INTEGER_ARRAY a as parameter.
*/
public static int pickingNumbers(List<Integer> a) {
int result = 0, k;
boolean band;
List<Integer> arrayAux = new ArrayList<Integer>();
for (int i = 0; i < a.size(); i++) {
arrayAux.add(a.get(i));
for (int j = 0; j < a.size(); j++) {
k = 0;
band = true;
while (k < arrayAux.size() && band) {
band = (Math.abs(arrayAux.get(k) - a.get(j)) <= 1) ? true : false;
k++;
}
if (band) arrayAux.add(a.get(j));
}
if (arrayAux.size() - 1 > result) result = arrayAux.size() - 1;
arrayAux.clear();
}
return result;
}
}
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")));
int n = Integer.parseInt(bufferedReader.readLine().trim());
List<Integer> a = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
.map(Integer::parseInt)
.collect(toList());
int result = Result.pickingNumbers(a);
bufferedWriter.write(String.valueOf(result));
bufferedWriter.newLine();
bufferedReader.close();
bufferedWriter.close();
}
}