#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define N 2005

int x[4], y[4], sum;
void solve()
{
    for (int i = 0; i < 4; i++)
        cin >> x[i] >> y[i], sum += x[i] * y[i];
    int a = sqrt(sum + 0.5);
    if (a * a != sum)
    {
        cout << 0;
        return;
    }
    for (int i = 0; i < 16; i++)
    {
        int b = 0, c = 0;
        for (int j = 0; j < 4; j++)
        {
            if (i >> j & 1)
                b += x[j], c += y[j];
            else
                b += y[j], c += x[j];
        }
        if (b & 1 || c & 1)
            continue;
        b >>= 1, c >>= 1;
        if (a == b && a == c)
        {
            cout << 1;
            return;
        }
    }
    cout << 0;
}
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    // cin >> t;
    while (t--)
        solve();
}