记录编号	8752	评测结果	AAAAAAAAAAAAAAAA
题目名称	[POI 1999] 位图	最终得分	100
用户昵称	BYVoid	是否通过	通过
代码语言	C++	运行时间	0.244 s
提交时间	2008-12-14 16:33:15	内存使用	0.77 MiB

/* 
 * Problem: POI1999 bit
 * Author: Guo Jiabao
 * Time: 2008.12.10 16:13:20
 * State: Unsolved 
*/
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>

using namespace std;

const int MAX=183;
const int INF=0x7FFFFFFF;
const int dx[4]={0,0,-1,1},dy[4]={-1,1,0,0};

struct point
{
	int x,y;
};

int N,M,Head,Tail;
int dist[MAX][MAX],bit[MAX][MAX];
point Que[MAX*MAX];

void init()
{
	int i,j,c;
	freopen("bit.in","r",stdin);
	freopen("bit.out","w",stdout);
	scanf("%d%d",&N,&M);
	Head=0;Tail=-1;
	for (i=1;i<=N;i++)
	{
		for (j=1;j<=M;j++)
		{
			dist[i][j]=INF;
			c=getchar();
			while (c==10 || c==13) c=getchar();
			bit[i][j]=c-'0';
			if (c=='1')
			{
				Que[++Tail].x=i;
				Que[Tail].y=j;
				dist[i][j]=0;
			}
		}
	}
}

void BFS()
{
	point i,j;
	int k;
	while (Head<=Tail)
	{
		i=Que[Head++];
		for (k=0;k<4;k++)
		{
			j.x=i.x+dx[k]; j.y=i.y+dy[k];
			if (1<=j.x && j.x <=N && 1<=j.y && j.y<=M && dist[i.x][i.y]+1<dist[j.x][j.y])
			{
				dist[j.x][j.y]=dist[i.x][i.y]+1;
				Que[++Tail]=j;
			}
		}
	}
}

void print()
{
	int i,j;
	for (i=1;i<=N;i++)
	{
		for (j=1;j<=M;j++)
			printf("%d ",dist[i][j]);
		putchar('\n');
	}
}

int main()
{
	init();
	BFS();
	print();
	return 0;
}