Submission #765213

#	Time	Username	Problem	Language	Result	Execution time	Memory
765213		ono_de206	Seats (IOI18_seats)	C++14	17 / 100	4021 ms	60336 KiB

seats

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

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second
#define x first
#define y second

const int mxn = 1e6 + 10;
int n, m, k, ans;
int dp[mxn];
pair<int, int> p[mxn];
pair<pair<int, int>, pair<int, int>> rec[mxn];

void mnn(int &x, int y) {
	if(x > y) x = y;
}

void mxx(int &x, int y) {
	if(x < y) x = y;
}

void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
	n = H;
	m = W;
	k = R.size();
	for(int i = 0; i < k; i++) {
		p[i + 1] = {R[i], C[i]};
	}
	rec[0] = {{1e9, 1e9}, {-1e9, -1e9}};
	for(int i = 1; i <= k; i++) {
		rec[i] = rec[i - 1];
		mnn(rec[i].ff.x, p[i].x);
		mnn(rec[i].ff.y, p[i].y);
		mxx(rec[i].ss.x, p[i].x);
		mxx(rec[i].ss.y, p[i].y);
		if((rec[i].ss.x - rec[i].ff.x + 1) * (rec[i].ss.y - rec[i].ff.y + 1) == i) ans++, dp[i] = 1;
	}
}

int swap_seats(int a, int b) {
	a++;
	b++;
	if(a > b) swap(a, b);
	swap(p[a], p[b]);
	for(int i = a; i <= b; i++) {
		ans -= dp[i];
		dp[i] = 0;
		rec[i] = rec[i - 1];
		mnn(rec[i].ff.x, p[i].x);
		mnn(rec[i].ff.y, p[i].y);
		mxx(rec[i].ss.x, p[i].x);
		mxx(rec[i].ss.y, p[i].y);
		if((rec[i].ss.x - rec[i].ff.x + 1) * (rec[i].ss.y - rec[i].ff.y + 1) == i) ans++, dp[i] = 1;
	}
	return ans;
}

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