IN which case my programe get WA ?
plz Help me...
//
//

#include <iostream>
#include <cstdlib>

using namespace std;

int main(){

    long int *w;
    int n , tmp;
    cin >> n;
    if(n>20)
        exit(0);
    w = new long int [n];
    for(int i =0 ; i < n ; i++)
        cin >>w[i];

    // bubble sort
    for(int i = 0 ; i < n-1 ; i++)
    {
        for(int j =i+1 ; j < n ; j++)
        {
            if(w[i] < w[j])
            {
                tmp = w[i];
                w[i] = w[j];
                w[j] = tmp;
            }
        }
    }

    long int minimal = w[0];
    for(int i = 1 ; i < n ; i++)
    {
        if(minimal > w[i])
            minimal-=w[i];
        else
            minimal =w[i] - minimal;
    }


    cout << endl << minimal << endl;

    return 0;
}

5
2
3
2
3
2

right answer is 0

How?

3+3=6
2+2+2=6
????

#include <bits/stdc++.h>
using namespace std;
bool b[18];
int n;
void get(int a,int n)
{
    for ( int i= 0; i < n; i ++)
    {
        if (a%2==0) b[i]=false;
        else b[i]=true;
        a/=2;
    }
}
int main ()
{
    int n,a[18],dn;
    __int64 s1=0,s2=0,dx,dk;
    cin >> n;
    for ( int i = 0; i < n; i++)
    {
        cin >> a[i];
        s1+=a[i];
    }
    dx=abs(s1-s2);
    dn=(1<<n);
    s1=0;
    for (int i = 1; i < dn; i++)
    {
        get(i,n);
        s1=0;s2=0;
        for (int j=0;j<n;j++)
        {
        if (b[j]) s2=s2+a[j];
        else s1=s1+a[j];
        }
        dk=abs(s1-s2);
        dx=min(dx,dk);
    }
    cout<<dx;
}