Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

根据一大牛的dir=(dir+3)%4的思想AC了

Posted by stupidjohn at 2010-05-23 18:42:15 on Problem 3083
#include<iostream>
using namespace std;
int direction[4][2]={1,0,0,1,0,-1,-1,0};
int ldire[8][2]={0,-1,-1,0,0,1,1,0,0,-1,-1,0,0,1,1,0};
int rdire[8][2]={0,1,-1,0,0,-1,1,0,0,1,-1,0,0,-1,1,0};
char map[40][40];
int m,n,sx,sy,ex,ey;
int tqueue[160];
int front,rear,size;
void queueinit()
{
	front=rear=-1;
	size=0;
}
int isempty()
{
	return size<=0;
}
void enqueue(int num)
{
	tqueue[(++front)%160]=num;
	size++;
}
int dequeue()
{
	return (tqueue[(++rear)%160]);
	size--;
}
void init()
{
	int i,j;
	cin>>n>>m;
	for(i=0;i<m;i++)
	for(j=0;j<n;j++)
	{
		cin>>map[i][j];
		if(map[i][j]=='S') {sx=i;sy=j;map[i][j]='.';}
		if(map[i][j]=='E') {ex=i;ey=j;map[i][j]='.';}
	}
}
int isin(int i,int j)
{
	return (i>=0&&i<m&&j>=0&&j<n);
}
void run()
{
	int distance,dir;
	int pos,xpos,ypos,newx,newy,i;
	init();
	// left
	distance=1;
	dir=0;
	newx=sx;
	newy=sy;
	while(newx!=ex||newy!=ey)
	{
		dir=(dir+3)%4;
		for(i=dir;i<dir+4;i++)
		{
			newx=newx+ldire[i][0];
			newy=newy+ldire[i][1];
			if(isin(newx,newy)&&map[newx][newy]=='.')
			{
				dir=i;
				distance++;
				break;
			}
			newx=newx-ldire[i][0];
			newy=newy-ldire[i][1];
		}
	}
	cout<<distance<<" ";
	//right
	distance=1;
	dir=0;
	newx=sx;
	newy=sy;
	while(newx!=ex||newy!=ey)
	{
		dir=(dir+3)%4;
		for(i=dir;i<dir+4;i++)
		{
			newx=newx+rdire[i][0];
			newy=newy+rdire[i][1];
			if(isin(newx,newy)&&map[newx][newy]=='.')
			{
				dir=i;
				distance++;
				break;
			}
			newx=newx-rdire[i][0];
			newy=newy-rdire[i][1];
		}
	}
	cout<<distance<<" ";
	// direction
	queueinit();
	enqueue(ex*40+ey);
	while(!isempty()&&map[sx][sy]=='.')
	{
		pos=dequeue();
		xpos=pos/40;
		ypos=pos%40;
		for(i=0;i<4;i++)
		{
			newx=xpos+direction[i][0];
			newy=ypos+direction[i][1];
			if(isin(newx,newy)&&map[newx][newy]=='.')
			{
				map[newx][newy]+=map[xpos][ypos]-'.'+1;
				enqueue(newx*40+newy);
			}
		}
	}
	cout<<(int)(map[sx][sy]-'.'+1)<<endl;
}
int main()
{
	int times;
	cin>>times;
	while((--times)>=0)
	run();
	return 1;
}

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator