Submission #1082470

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082470		EntityPlantt	Portal (BOI24_portal)	C++17	21 / 100	16 ms	604 KiB

Main

#include <iostream>
#include <algorithm>
using namespace std;
#define int long long

inline int area(int x1, int y1, int x2, int y2, int x3, int y3){
	x2 -= x1, x3 -= x1;
	y2 -= y1, y3 -= y1;
	return abs(x2 * y3 - x3 * y2);
}

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n, x0, y0, xl, yl, g = 0;
	cin >> n;
	if (n <= 2) {
		cout << -1;
		return 0;
	}
	cin >> x0 >> y0 >> xl >> yl;
	for (int i = 2; i < n; i++) {
		int x, y;
		cin >> x >> y;
		g = __gcd(g, area(x0, y0, xl, yl, x, y));
		xl = x;
		yl = y;
	}
	cout << (g ? g : -1);
	return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 29
• Subtask 5: 0 / 15
• Subtask 6: 0 / 35