#include<iostream>
using namespace std;
double a[100],s1,s2;
int n;
void read()
{
    int i;
    cin>>n;
    for(i=0;i<n;i++) cin>>a[i];
}
void z()
{
    int i;
    s1=a[0];
    for(i=1;i<n;i++)
    {
        if(s1<s2) s1+=a[i];
        else s2+=a[i];
    }
    if(s1<s2) cout<<s2-s1<<endl;
    else cout<<s1-s2<<endl;

}

int main ()
{
    read();
    z();
    return 0;
}

Edited by author 03.11.2009 03:34