Balloons（山东省第一届ACM省赛）

Balloons

Time Limit: 1000ms Memory limit: 65536K 有疑问？点这里^_^

题目描述

Both Saya and Kudo like balloons. One day, they heard that in the central park, there will be thousands of people fly balloons to pattern a big image.
They were very interested about this event, and also curious about the image.
Since there are too many balloons, it is very hard for them to compute anything they need. Can you help them?
You can assume that the image is an N*N matrix, while each element can be either balloons or blank.
Suppose element A and element B are both balloons. They are connected if:
i) They are adjacent;
ii) There is a list of element C₁, C₂,
… , C_n,
while A and C₁ are
connected, C₁ and C₂ are
connected …C_n and B are
connected.
And a connected block means that every pair of elements in the block is connected, while any element in the block is not connected with any element out of the block.
To Saya, element A(xa,ya)and B(xb,yb) is adjacent if |xa-xb| + |ya-yb| ≤ 1
But to Kudo, element A(xa,ya) and
element B (xb,yb) is adjacent if |xa-xb|≤1 and |ya-yb|≤1
They want to know that there’s how many connected blocks with there own definition of adjacent?

输入

The input consists of several test cases.
The first line of input in each test case contains one integer N (0<N≤100), which represents the size of the
matrix.
Each of the next N lines contains a string whose length is N, represents the elements of the matrix. The string only consists of 0 and 1, while 0 represents a block and
1represents balloons.
The last case is followed by a line containing one zero.

输出

For each case, print the case number (1, 2 …) and the connected block’s numbers
with Saya and Kudo’s definition. Your output format should imitate the sample output. Print a blank line after each test case.

示例输入

示例输出

Case 1: 3 2

题目链接：http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2152

简单水题：

直接神搜就行了，每一块是气球的都遍历一下，看是否能够成一块新的，然后计数就好了。

#include <iostream>

#include <stdio.h>

#include <queue>

#include <algorithm>

#include <string>

#include <string.h>

using namespace std;

#define MAX 500

#define INF 0x3f3f3f3f

int dir[8][2]={{-1,0},{1,0},{0,-1},{0,1},{-1,-1},{-1,1},{1,-1},{1,1}};

int n;

bool mark[105][105];

char ch[105][105];

int ffind=-1; ///标记是哪个人的

bool dfs(int x,int y){

   if(x<0||y<0||x>=n||y>=n) return false;

   if(mark[x][y]==1||ch[x][y]=='0') return false;

   mark[x][y]=1;

   int mmax;

   ffind==1 ? mmax=4 : mmax=8;

   for(int i=0;i<mmax;i++)

       dfs(x+dir[i][0],y+dir[i][1]);

   return true;

}

int main (){

    int cnt=1;

    while(scanf("%d",&n)&&n!=0){

        for(int i=0;i<n;i++)

            scanf("%s",ch[i]);

        int sum1=0,sum2=0;

        //求解第一个人的

        memset(mark,0,sizeof(mark));

        ffind=1;

        for(int i=0;i<n;i++)

          for(int j=0;j<n;j++)

            if(dfs(i,j)) sum1++;

        //求解第二个人用的

        memset(mark,0,sizeof(mark));

        ffind=2;

        for(int i=0;i<n;i++)

          for(int j=0;j<n;j++)

            if(dfs(i,j)) sum2++;

        printf("Case %d: %d %d\n\n",cnt++,sum1,sum2);

    }

}

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