#include <bits/stdc++.h>

using namespace std;

int main() {

    int n, a, b, c, d;
    int resp = 0;

    cin >> n >> a >> b >> c >> d;

    int S = a+b+c+d;

    if(n == a) resp++;

    if(n == b) resp++;

    if(n == c) resp++;

    if(n == d) resp++;

    if(n == a+b) resp++;

    if(n == a+c) resp++;

    if(n == a+d) resp++;

    if(n == b+c) resp++;

    if(n == c+d) resp++;

    if(n == d+a) resp++;

    if(n == S-a) resp++;

    if(n == S-b) resp++;

    if(n == S-c) resp++;

    if(n == S-d) resp++;

    if(n == S) resp++;

    cout << resp << "\n";

    return 0;
}