#include <bits/stdc++.h>
#define int long long
using namespace std;

signed main() {
	int n, res = 0; cin >> n;
	vector<int> v(n + 1);
	for (int i = 1; i <= n; i++) {
		scanf("%lld", &v[i]);
		v[i] += v[i - 1];
	}
	for (int i = 1; i < n - 1; i++) {
		if (v[i] * 2 != v[n] - v[i]) continue;
		for (int j = i + 1; j < n; j++) {
			if (v[i] == v[j] - v[i] && v[i] == v[n] - v[j]) {
				res++;
			}
		}
	}
	cout << res;
	return 0;
}