#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
using ll=long long;
using pi=pair<int,int>;
using vi=vector<int>;
using vl=vector<ll>;
#define pb push_back
#define all(a) begin(a),end(a)

int get_total_area (vector <pi> v) {
	int res = 0;
	for (auto pp : v) {
		res += pp.first * pp.second;
	}
	return res;
}

bool f (vector <pi> v, int h, int w) {
	if (v.size() == 1) {
		return (v[0].first == h && v[0].second == w) || (v[0].first == w && v[0].second == h);
	}
	int br = (int)v.size();
	for (int mask = 1; mask < (1 << (br - 1)); mask++) {
		vector <pi> a, b;
		for (int i = 0; i < br; i++) {
			if (mask & (1 << i)) {
				a.push_back(v[i]);
			} else {
				b.push_back(v[i]);
			}
		}
		int area_a = get_total_area(a);
		int area_b = get_total_area(b);
		if (area_a % h == 0 && area_b % h == 0) {
			if (f(a, h, area_a / h) && f(b, h, area_b / h)) return 1;
		}
		if (area_a % w == 0 && area_b % w == 0) {
			if (f(a, w, area_a / w) && f(b, w, area_b / w)) return 1;
		}
	}
	return 0;
}

int main () {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	vector <pi> v(4);
	for (int i = 0; i < 4; i++) {
		cin >> v[i].first >> v[i].second;
	}
	int total_area = get_total_area(v);
	int s = sqrt(total_area);
	if (s * s != total_area) {
		cout << 0 << endl;
		return 0;
	}
	cout << f(v, s, s) << endl;
	return 0;
}