Submission #994651

#	Time	Username	Problem	Language	Result	Execution time	Memory
994651		pavement	Portal (BOI24_portal)	C++17	11 / 100	67 ms	12876 KiB

Main

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

#define pb push_back

int N, horiz, vert, x[100005], y[100005];
map<int, vector<int> > row, col;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> x[i] >> y[i];
		row[x[i]].pb(y[i]);
		col[y[i]].pb(x[i]);
	}
	for (auto i : row) {
		sort(i.second.begin(), i.second.end());
		if (i.second.size() > 1) {
			for (int j = 0; j + 1 < (int)i.second.size(); j++) {
				horiz = __gcd(horiz, i.second[j + 1] - i.second[j]);
			}
		}
	}
	for (auto i : col) {
		sort(i.second.begin(), i.second.end());
		if (i.second.size() > 1) {
			for (int j = 0; j + 1 < (int)i.second.size(); j++) {
				vert = __gcd(vert, i.second[j + 1] - i.second[j]);
			}
		}
	}
	if (horiz == 0 || vert == 0) {
		cout << "-1\n";
	} else {
		cout << (long long)horiz * vert << '\n';
	}
}

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