Submission #144280

#	Time	Username	Problem	Language	Result	Execution time	Memory
144280		Minnakhmetov	Seats (IOI18_seats)	C++14	0 / 100	4043 ms	39544 KiB

seats

#include "seats.h"
#include<bits/stdc++.h>

using namespace std;

const int N = 1e6 + 5, INF = 1e9;
int n, m;
vector<int> x, y;
int lx[N], rx[N], ly[N], ry[N];
bool rect[N];

int ans = 0;

void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	n = H;
	m = W;
	x = R;
	y = C;

	lx[0] = INF;
	rx[0] = -1;
	ly[0] = INF;
	ry[0] = -1;

	for (int i = 1; i <= n * m; i++) {
		lx[i] = min(lx[i - 1], x[i - 1]);
		rx[i] = max(rx[i - 1], x[i - 1]);
		ly[i] = min(ly[i - 1], y[i - 1]);
		ry[i] = max(ry[i - 1], y[i - 1]);

		if ((rx[i] - lx[i] + 1) * (ry[i] - ly[i] + 1) == i) {
			rect[i] = 1;
			ans++;
		}
	}
}

int swap_seats(int a, int b) {
	swap(x[a], x[b]);
	swap(y[a], y[b]);

	for (int i = a + 1; i <= b + 1; i++) {
		lx[i] = min(lx[i - 1], x[i - 1]);
		rx[i] = max(rx[i - 1], x[i - 1]);
		ly[i] = min(ly[i - 1], y[i - 1]);
		ry[i] = max(ry[i - 1], y[i - 1]);

		ans -= rect[i];

		if ((rx[i] - lx[i] + 1) * (ry[i] - ly[i] + 1) == i) {
			rect[i] = 1;
			ans++;
		}
		else {
			rect[i] = 0;
		}
	}

	return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 20
• Subtask 4: 0 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30