result.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int[] vector = null;
        Integer result = null;
        try (Scanner scanner = new Scanner(new File(args[0]))) {
            String[] numberTokens = scanner.nextLine().split(",");
            vector = new int[numberTokens.length];
            for (int i = 0; i < numberTokens.length; i++) {
                vector[i] = Integer.parseInt(numberTokens[i]);
            }
        }
        catch (FileNotFoundException ex) {
            throw new RuntimeException(ex);
        }
        /* YOUR CODE HERE */
        for (int i = 1; i < vector.length; i+=2) {
            int num = vector[i];
            // TODO : tester si value est premier ?
            boolean notPrime = false;
            for (int j = 2; j <= num/2; ++j) {
                // condition for nonprime number
                if(num % j == 0)  {
                    notPrime = true;
                    break;
                }
            }
            if (!notPrime && (result == null || num < result)) {
                result = num;
            }
        }
        if (result != null) {
            System.out.println(result);
        } else {
            System.out.println("NULL");
        }
    }
}