import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static long[] prefixsum(int [] arr){
        int n = arr.length;
        long psum[] = new long[n];
        psum[0] = arr[0];
        for(int i=1 ; i<n ; i++){
            psum[i] = psum[i-1] + arr[i];
        }
        return psum;
    }
    public static int countofEquilibrum(int [] arr){
        int n = arr.length;
        int count = 0 ;
        long psum[] = prefixsum(arr);
        for(int i=0; i<n; i++){
            long lsum = 0;
            if(i != 0){
                lsum = psum[i-1];
            }
            long  rsum = psum[n-1] - psum[i];
            if(lsum == rsum){
                count++;
            }
        }
        return count ; 
        
    }
    public static void main(String[] args) {
        int [] arr = {1, 3, 5, 2, 2};
        System.out.println("The number of Equilibrum index is " + countofEquilibrum(arr));
    }
}