#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,a[100],sum[100],sum_m=0,i_m,i,k,minn=INT_MAX;
    cin >> n;fill(sum,sum+n,0);
    for (i=0;i<n;i++)
    {
        cin >> a[i]; if (i==0) sum[i]=a[i]; else sum[i]=sum[i-1]+a[i];
    }
    sum_m=sum[n-1];
    cout << "Sum = " << sum_m << endl;
    for (i=0;i<n;i++)
    {
        k=sum_m-sum[i];
         if (abs(k-sum[i]+a[i])<minn)  minn=abs(k-sum[i]+a[i]);
    }
    cout << "Positions:" << endl;int count=1;
    for (i=0;i<n;i++)
    {
        k=sum_m-sum[i];
         if (abs(k-sum[i]+a[i])==minn) { cout << count++ << ") " <<i+1 << endl; }
    }
    return 0;
}