Stack

import java.util.Arrays;


public class Kilpalaatikko {

    public static void main(String[] args) {
        IO io = new IO();

//        String a = io.next(); // Lukee seuraavan välein erotellun merkkijonon.
//        int b = io.nextInt(); // Lukee seuraavan välein erotellun int-kokonaisluvun.
//        long c = io.nextLong(); // Lukee seuraavan välein erotellun long-kokonaisluvun.
//        double d = io.nextDouble(); // Lukee seuraavan välein erotellun double-liukuluvun.
        int n = io.nextInt();
        long[] array = new long[n];
        for (int i = 0; i < n; i++) {
            array[i] = io.nextLong();
        }
        
        Arrays.sort(array);
        long summa = 0;
        int answer = 0;
        for (int i = 0; i < n; i++) {
            if(summa <array[i]){
                summa += array[i];
                answer++;
            }
        }
        
        io.println(answer);
        
        // Toimii kuten System.out.println.
//        io.println("Annoit syötteenä " + a + " " + b + " " + c + " " + d);
        io.close(); // TÄYTYY KUTSUA LOPUKSI, muuten tuloste voi jäädä kirjoittamatta
    }

}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED