poj 1970(搜索)

The Game

Time Limit: 1000MS		Memory Limit: 30000K
Total Submissions: 6247		Accepted: 1601

Description

A game of Renju is played on a 19*19 board by two players. One player uses black stones and the other uses white stones. The game begins in an empty board and two players alternate in placing black stones and white stones. Black always goes first. There are 19 horizontal lines and 19 vertical lines in the board and the stones are placed on the intersections of the lines.

Horizontal lines are marked 1, 2, ..., 19 from up to down and vertical lines are marked 1, 2, ..., 19 from left to right.



The objective of this game is to put five stones of the same color
consecutively along a horizontal, vertical, or diagonal line. So, black
wins in the above figure. But, a player does not win the game if more
than five stones of the same color were put consecutively.

Given a configuration of the game, write a program to determine
whether white has won or black has won or nobody has won yet. There will
be no input data where the black and the white both win at the same
time. Also there will be no input data where the white or the black wins
in more than one place.

Input

The
first line of the input contains a single integer t (1 <= t <=
11), the number of test cases, followed by the input data for each test
case. Each test case consists of 19 lines, each having 19 numbers. A
black stone is denoted by 1, a white stone is denoted by 2, and 0
denotes no stone.

Output

There
should be one or two line(s) per test case. In the first line of the
test case output, you should print 1 if black wins, 2 if white wins, and
0 if nobody wins yet. If black or white won, print in the second line
the horizontal line number and the vertical line number of the left-most
stone among the five consecutive stones. (Select the upper-most stone
if the five consecutive stones are located vertically.)

Sample Input

1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 2 0 0 2 2 2 1 0 0 0 0 0 0 0 0 0 0
0 0 1 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 2 2 0 0 0 0 0 0 0 0 0 0 0 0
0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Sample Output

1
3 2

错了N次。。这个题坑点在于只能是五子棋，6子，7子都不行，所以对一个点的某一个方向来说正反都要搜一遍。
而且还要注意是结果是要位于左上角的点。所以可以先将某一列的每一行先找一遍，这样的话得到的结果就一定是左上角的点。
给大家两组测试用例：
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 2 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
输出是0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 2 2 2 1 0 0 0 0 0 0 0 0 0 0
0 0 1 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
0 1 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 1 2 2 0 0 0 0 0 0 0 0 0 0 0 0
0 0 1 1 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
答案是
1
6 1

#include<cstdio>
#include<cstring>
#include<algorithm>
#include<math.h>
#include<queue>
#include<iostream>
using namespace std;
typedef long long LL;
int graph[][];
bool vis[][];
int cnt;
int res,resx,resy;
int dir[][] = {{,},{-,},{,},{,-},{,},{-,-},{-,},{,-}};
bool check(int x,int y,int flag)
{
    if(x<||x>||y<||y>||graph[x][y]!=flag) return false;
    return true;
}
struct Node
{
    int x,y;
    int step;
};
Node s;
bool bfs(int x,int y,int flag)
{
    Node now;
    now.x = x,now.y = y,now.step = ;
    Node next;
    for(int i=; i<; i++)
    {
        next.x = now.x+dir[i][];
        next.y = now.y +dir[i][];
        next.step = now.step+;
        while(check(next.x,next.y,flag))
        {
            next.x+=dir[i][];
            next.y+=dir[i][];
            next.step++;
        }
        int step1 = next.step - ;
        next.x = now.x+dir[i^][]; ///反方向也要找
        next.y = now.y +dir[i^][];
        next.step = now.step+;
        while(check(next.x,next.y,flag))
        {
            next.x+=dir[i^][];
            next.y+=dir[i^][];
            next.step++;
        }
        int step2 = next.step - ;
        if(step1+step2==) return true;
    }
    return false;
}
int main()
{
    int tcase;
    scanf("%d",&tcase);
    while(tcase--)
    {
        for(int i=; i<; i++)
        {
            for(int j=; j<; j++)
            {
                scanf("%d",&graph[i][j]);
            }
        }
        bool flag = false;
        res = ,resx=-,resy=-;
        for(int j=; j<&&!flag; j++)
        {
            for(int i=; i<&&!flag; i++)
            {
                if(graph[i][j]==)
                {
                    flag =  bfs(i,j,);
                    if(flag)
                    {
                        res = ;
                        resx = i;
                        resy = j;
                    }
                }
                if(graph[i][j]==)
                {
                    flag =  bfs(i,j,);
                    if(flag)
                    {
                        res = ;
                        resx = i;
                        resy = j;
                    }
                }
            }
        }
        if(res==) printf("0\n");
        else printf("%d\n%d %d\n",res,resx,resy);
    }
    return ;
}