Submission #115544

#	Time	Username	Problem	Language	Result	Execution time	Memory
115544		WhipppedCream	Seats (IOI18_seats)	C++17	17 / 100	4104 ms	44920 KiB

seats

#include <bits/stdc++.h>
#include "seats.h"
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;

const int maxn = 1e6+5;

int r[maxn], c[maxn];
int mnr[maxn];
int mxr[maxn];
int mnc[maxn];
int mxc[maxn];
int n, m;
int ans = 0;

void give_initial_chart(int H, int W, vector<int> R, vector<int> C)
{
	n = H; m = W;
	for(int i = 0; i< n*m; i++)
	{
		r[i] = R[i]; 
		c[i] = C[i];
	}
	for(int i = 0; i< n*m; i++)
	{
		mnr[i] = min(i?mnr[i-1]:n*m, r[i]);
		mxr[i] = max(i?mxr[i-1]:0, r[i]);
		mnc[i] = min(i?mnc[i-1]:n*m, c[i]);
		mxc[i] = max(i?mxc[i-1]:0, c[i]);
		if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) ans++;
	}
}

int swap_seats(int a, int b)
{
	if(a> b) swap(a, b);
	swap(r[a], r[b]);
	swap(c[a], c[b]);
	for(int i = a; i< b; i++)
	{
		int old = 0;	
		if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) old = 1;
		mnr[i] = min(i?mnr[i-1]:n*m, r[i]);
		mxr[i] = max(i?mxr[i-1]:0, r[i]);
		mnc[i] = min(i?mnc[i-1]:n*m, c[i]);
		mxc[i] = max(i?mxc[i-1]:0, c[i]);
		int nw = 0;
		if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) nw = 1;
		ans += nw-old;
	}
	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