Submission #1105290

#	Time	Username	Problem	Language	Result	Execution time	Memory
1105290		thelegendary08	Seats (IOI18_seats)	C++14	17 / 100	4051 ms	59180 KiB

seats

#include "seats.h"
#include<bits/stdc++.h>
#define f0r(i,n) for(int i=0; i<n; i++)
#define pb push_back
#define vi vector<int>
#define pii pair<int,int>
using namespace std;
vector<pair<int,int>>v;
vector<pair<pii,pii>>state;
vector<bool>nice;
int ca;
int h, w;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	h = H;
	w = W;
	ca = 0;
	f0r(i, H * W){
		v.pb({R[i], C[i]});
	}
	pii x = {v[0].first, v[0].first};
	pii y = {v[0].second, v[0].second};
	nice.resize(h*w);
	f0r(i, h*w){
		x.first = min(v[i].first, x.first);
		x.second = max(v[i].first, x.second);
		y.first = min(v[i].second, y.first);
		y.second = max(v[i].second, y.second);
		state.pb({x,y});
		if((x.second - x.first + 1) * (y.second - y.first + 1) == i+1){
			nice[i] = 1;
			ca++;
		}
		else{
			nice[i] = 0;
		}
	}
	//cout<<ca<<'\n';
}

int swap_seats(int a, int b) {
	if(a > b)swap(a, b);
	swap(v[a], v[b]);
	pii x;
	pii y;
	if(a == 0)x = {1e9, -1};
	else x = state[a-1].first;
	if(a == 0)y = {1e9, -1};
	else y = state[a-1].second;
	int minus = 0;
	for(int i = a; i<=b; i++){
		minus += nice[i];
	}
	ca -= minus;
	int plus = 0;
	for(int i = a; i<=b; i++){
		x.first = min(v[i].first, x.first);
		x.second = max(v[i].first, x.second);
		y.first = min(v[i].second, y.first);
		y.second = max(v[i].second, y.second);
		state[i] = {x,y};
		if((x.second - x.first + 1) * (y.second - y.first + 1) == i+1){
			nice[i] = 1;
			plus++;
		}
		else{
			nice[i] = 0;
		}
	}
	ca += plus;
	//cout<<minus<<' '<<plus<<'\n';
	//f0r(i, h*w)cout<<nice[i]<<' ';
	//cout<<'\n';
	return ca;
}

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