제출 #1051603

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1051603		deera	Portal (BOI24_portal)	C++14	11 / 100	38 ms	3000 KiB

Main

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

typedef long long ll;

struct Portal {
    public:
        ll x;
        ll y;
};

void print(Portal p) {
    cout << p.x << " " << p.y << endl;
}

ll gcd(ll x, ll y) {
    return (ll)__gcd((int)x, (int)y);
}

void solve() {
    ll n;
    cin >> n;

    vector<Portal> portals(n);
    for (ll i = 0; i < n; i++)
        cin >> portals[i].x >> portals[i].y;

    if (n <= 2) return (void)(cout << -1 << endl);

    ll box_x = 0;
    ll box_y = 0;
    Portal c = portals[0];

    for(auto p: portals) {
        box_x = gcd(std::abs(p.x - c.x), box_x);
        box_y = gcd(std::abs(p.y - c.y), box_y);
    }

    ll a = box_x * box_y;

    if (n == 3) a = min(a, 4ll); // JUST TESTING

    if (a == 0) cout << -1 << endl;
    else cout << a << endl;

}

int main() {solve();}

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