Submission #113640

#	Time	Username	Problem	Language	Result	Execution time	Memory
113640		tinjyu	Seats (IOI18_seats)	C++14	0 / 100	4009 ms	62988 KiB

seats

#include "seats.h"
#include <iostream>
using namespace std;
long long int num=1,ans[1000005],x[1000005],y[1000005],lx[1000005],rx[1000005],ly[1000005],ry[1000005],n;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	n=H*W;
	for(int i=0;i<n;i++)
	{
		x[i]=R[i];
		y[i]=C[i];
	}
	ans[0]=1,lx[0]=x[0],rx[0]=x[0],ly[0]=y[0],ry[0]=y[0];
	for(int i=1;i<n;i++)
	{
		lx[i]=min(x[i],lx[i-1]);
		rx[i]=max(x[i],rx[i-1]);
		ly[i]=min(y[i],ly[i-1]);
		ry[i]=max(y[i],ry[i-1]);
		//cout<<lx<<" "<<rx<<" "<<ly<<" "<<ry<<endl;
		if((rx[i]-lx[i]+1)*(ry[i]-ly[i]+1)==i+1)
		{
			ans[i]=1;
			num++;
		}
	}
}

int swap_seats(int a, int b) {
	swap(x[a],x[b]);
	swap(y[a],y[b]);
	if(a==0)a=1;
	ans[0]=1,lx[0]=x[0],rx[0]=x[0],ly[0]=y[0],ry[0]=y[0];
	for(int i=a;i<=b;i++)
	{
		lx[i]=min(x[i],lx[i-1]);
		rx[i]=max(x[i],rx[i-1]);
		ly[i]=min(y[i],ly[i-1]);
		ry[i]=max(y[i],ry[i-1]);
		//cout<<num<<" "<<ans[i]<<" "<<i<<" "<<lx[i]<<" "<<rx[i]<<" "<<ly[i]<<" "<<ry[i]<<endl;
		if((rx[i]-lx[i]+1)*(ry[i]-ly[i]+1)==i+1)
		{
			if(ans[i]==0)
			{
				num++;
				ans[i]=1;
			}
		}
		else if(ans[i]==1)
		{
			num--;
			ans[i]=0;
		}
		//cout<<num<<endl;
	}
  return num;
}

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