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| Time Limit: 2000MS | Memory Limit: 65536KB | 64bit IO Format: %I64d & %I64u |
Description
A famous Berland‘s painter Kalevitch likes to shock the public. One of his last obsessions is chess. For more than a thousand years people have been playing this old game on uninteresting, monotonous boards. Kalevitch decided to put an end to this tradition and to introduce a new attitude to chessboards.
As before, the chessboard is a square-checkered board with the squares arranged in a 8?×?8 grid, each square is painted black or white. Kalevitch suggests that chessboards should be painted in the following manner: there should be chosen a horizontal or a vertical line of 8 squares (i.e. a row or a column), and painted black. Initially the whole chessboard is white, and it can be painted in the above described way one or more times. It is allowed to paint a square many times, but after the first time it does not change its colour any more and remains black. Kalevitch paints chessboards neatly, and it is impossible to judge by an individual square if it was painted with a vertical or a horizontal stroke.
Kalevitch hopes that such chessboards will gain popularity, and he will be commissioned to paint chessboards, which will help him ensure a comfortable old age. The clients will inform him what chessboard they want to have, and the painter will paint a white chessboard meeting the client‘s requirements.
It goes without saying that in such business one should economize on everything — for each commission he wants to know the minimum amount of strokes that he has to paint to fulfill the client‘s needs. You are asked to help Kalevitch with this task.
Input
The input file contains 8 lines, each of the lines contains 8 characters. The given matrix describes the client‘s requirements, W character stands for a white square, and B character — for a square painted black.
It is guaranteed that client‘s requirments can be fulfilled with a sequence of allowed strokes (vertical/column or horizontal/row).
Output
Output the only number — the minimum amount of rows and columns that Kalevitch has to paint on the white chessboard to meet the client‘s requirements.
Sample Input
WWWBWWBW BBBBBBBB WWWBWWBW WWWBWWBW WWWBWWBW WWWBWWBW WWWBWWBW WWWBWWBW
3
WWWWWWWW BBBBBBBB WWWWWWWW WWWWWWWW WWWWWWWW WWWWWWWW WWWWWWWW WWWWWWWW
1
Source
有一个 8*8的棋盘,每个方格原来有一部分白色(W),现在有一部分被涂成了黑色(B),现在要把整个棋盘涂成白色,问至少需要涂多少行(列)是的整个棋盘变成白色.
PS:英语渣呀,看了别人的代码才知道要涂的肯定是整行或整列,模拟就可以了,顺便附上Q神的代码.
#include <iostream>
using namespace std;
char a[10][10];
bool black_row(int x)//行
{
for(int i=0;i<8;i++)
if(a[x][i]=='W')
return false;
return true;
}
bool black_col(int x)//列
{
for(int i=0;i<8;i++)
if(a[i][x]=='W')
return false;
return true;
}
int main()
{
for(int i=0;i<8;i++)
cin>>a[i];
int black=0;
int ans=0;
for(int i=0;i<8;i++)
if(black_row(i)) ans++;
for(int i=0;i<8;i++)
if(black_col(i)) ans++;
if(ans==16) ans=8;
cout<<ans<<endl;
return 0;
}
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cmath>
#include<iostream>
#include<algorithm>
using namespace std;
char s[15][15];
int main()
{
for(int i=0;i<8;i++)
scanf("%s",s[i]);//B->W
bool flag=0;
int x,y;
for(int i=0;i<8;i++)
for(int j=0;j<8;j++)
if(s[i][j]=='W')
{
flag=1;
x=i;
y=j;
}
if(!flag)return 0*printf("8");//全部为B
int res=0;
for(int i=0;i<8;i++)
res+=s[i][y]=='B';
for(int j=0;j<8;j++)
res+=s[x][j]=='B';
return 0*printf("%d",res);
}
CodeForces - 7A Kalevitch and Chess(搜索?!模拟!)
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原文地址：http://blog.csdn.net/hurmishine/article/details/51615174
