Submission #114342

#	Time	Username	Problem	Language	Result	Execution time	Memory
114342		tinjyu	Seats (IOI18_seats)	C++14	0 / 100	729 ms	262144 KiB

seats

#include "seats.h"
#include <iostream>
using namespace std;
vector<int> r;
long long int lx,rx,ly,ry,c,d,x[1000005],y[1000005],n,maxxtree[2000005],minxtree[2000005],maxytree[2000005],minytree[2000005];
int build(int s,int e,int t)
{
	if(s==e)
	{
		maxxtree[t]=x[e];
		minxtree[t]=x[e];
		maxytree[t]=y[e];
		minytree[t]=y[e];
		return 0;
	}
	else
	{
		build(s,(s+e)/2,t*2);
		build((s+e)/2+1,e,t*2+1);
		maxxtree[t]=max(maxxtree[t*2],maxxtree[t*2+1]);
		minxtree[t]=min(minxtree[t*2],minxtree[t*2+1]);
		maxytree[t]=max(maxytree[t*2],maxytree[t*2+1]);
		minytree[t]=max(minytree[t*2],minytree[t*2+1]);
		return 0;
	}
}
int change(int s,int e,int t)
{
	if(s==e)
	{
		maxxtree[t]=x[e];
		minxtree[t]=x[e];
		maxytree[t]=y[e];
		minytree[t]=y[e];
		return 0;
	}
	else if(s>d || e<c)return 0;
	else
	{
		change(s,(s+e)/2,t*2);
		change((s+e)/2+1,e,t*2+1);
		maxxtree[t]=max(maxxtree[t*2],maxxtree[t*2+1]);
		minxtree[t]=min(minxtree[t*2],minxtree[t*2+1]);
		maxytree[t]=max(maxytree[t*2],maxytree[t*2+1]);
		minytree[t]=max(minytree[t*2],minytree[t*2+1]);
	}
}
int find(int s,int e,int t)
{
	if(c>e || d<s)return 0;
	else if(s<=c && d<=e)
	{
		lx=min(minxtree[t],lx);
		rx=max(maxxtree[t],rx);
		ly=min(minytree[t],ly);
		ry=max(maxytree[t],ry);
	}
	else
	{
		find(s,(s+e)/2,t*2);
		find((s+e)/2+1,e,t*2);
	}
}
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];
	}
	build(0,n-1,1);
}
 
int swap_seats(int a, int b) {
	swap(x[a],x[b]);
	swap(y[a],y[b]);
	if(a>b)swap(a,b);
	c=a,d=b;
	change(0,n-1,1);
	int ans=1;
	lx=x[0],rx=x[0],ly=y[0],ry=y[0];
	for(int i=1;i<n;i++)
	{
		lx=min(x[i],lx);
		rx=max(x[i],rx);
		ly=min(y[i],ly);
		ry=max(y[i],ry);
		//cout<<lx<<" "<<rx<<" "<<ly<<" "<<ry<<endl;
		if((rx-lx+1)*(ry-ly+1)==i+1)ans++;
		else
		{
			c=i,d=(rx-lx+1)*(ry-ly+1)-1;
			find(0,n-1,1);
		}
	}
  return ans;
}

Compilation message (stderr)

seats.cpp: In function 'int change(int, int, int)':
seats.cpp:47:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
seats.cpp: In function 'int find(int, int, int)':
seats.cpp:63:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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