#include <iostream.h>
#include <stdlib.h>

int N;
int aWeight[20];
int p2[20]={1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,65536,131072,262144,524288};
int S,SL,minD;

int main()
{
    cin >> N;
    S=0;
    for(int i=0;i<N;i++)
    {
        cin>>aWeight[i];
        S+=aWeight[i];
    }
    minD=S;
    for(int i=0;i<p2[N];i++)
    {
        SL=0;
        for(int d=0;d<N;d++)
            if(i & p2[d])
                SL+=aWeight[d];
        if(abs(S-2*SL) < minD)
            minD = abs(S-2*SL);

    }
    cout<<minD;
}

Add 1048576 to array p2 and you'll get AC.
(Let N=20 then ...)

Oh! Thanks a lot. Now it works!