习题3.6 纵横字谜的答案 UVa232

1.题目描述：点击打开链接

2.解题思路：本题属于模拟题，按照题意，第一步标记出各个点的起始位置的编号，第二步开始找这些字符串，先横着找，再竖着找。注意时刻都要警惕不要越界。在竖着找的时候由于不一定按照编号大小顺序加入vector，因此最后要再做一次排序。

3.代码：

#define _CRT_SECURE_NO_WARNINGS 
#include<iostream>
#include<algorithm>
#include<string>
#include<sstream>
#include<set>
#include<vector>
#include<stack>
#include<map>
#include<queue>
#include<deque>
#include<cstdlib>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<ctime>
#include<functional>
using namespace std;

typedef pair<int, string> P;
#define N 10+5
vector<P>across, down;
int g[N][N];
char gr[N][N];
int r, c;
void mark()//标记起始点的编号
{
	int cnt = 0;
	for (int i = 0; i < r;i++)
	for (int j = 0; j < c; j++)
	{
		if ((!i || !j)&&gr[i][j]!='*')g[i][j] = ++cnt;
		else if (gr[i][j]!='*'&&(gr[i - 1][j] == '*' || gr[i][j - 1] == '*'))g[i][j] = ++cnt;
	}
}
void solve()
{
	int pos,id;
	string s;
	for (int i = 0; i < r; i++)//横着找
	{
		int k = 0;
		while (k < c)
		{
			while (k < c&&!g[i][k])k++;
			if (k < c){ id = g[i][k]; s.clear(); }
			else break;
			while (k < c&&gr[i][k]!='*') s += gr[i][k++];
			if (s.length()>0)across.push_back(P(id, s));
		}
	}
	for (int j = 0; j < c; j++)//竖着找
	{
		int i = 0;
		while (i < r)
		{
			while (i < r&&!g[i][j])i++;
			if (i < r){ id = g[i][j]; s.clear(); }
			else break;
			while (i < r&&gr[i][j] != '*')s += gr[i++][j];
			if (s.length()>0)down.push_back(P(id, s));
		}
	}
	sort(down.begin(), down.end());
}
int main()
{
	//freopen("t.txt", "r", stdin);
	int rnd = 0;
	while (~scanf("%d", &r)&&r)
	{
		cin >> c;
		across.clear(), down.clear();
		memset(g, 0, sizeof(g));
		memset(gr, '\0', sizeof(gr));
		for (int i = 0; i < r; i++)
			scanf("%s", gr[i]);
		mark();
		solve();
		if (rnd)cout << endl;
		printf("puzzle #%d:\n", ++rnd);
		puts("Across");
		int len = across.size();
		for (int i = 0; i < len; i++)
			printf("%3d.%s\n", across[i].first, across[i].second.c_str());
		puts("Down");
		len = down.size();
		for (int i = 0; i < len;i++)
			printf("%3d.%s\n", down[i].first, down[i].second.c_str());
	}
	return 0;
}

习题3.6 纵横字谜的答案 UVa232

原文：http://blog.csdn.net/u014800748/article/details/44548307