mar*_*cog 44 string algorithm data-structures
对于拼字游戏中的拼贴检查,您可以制作四个5x5的字母总计100个拼贴.我想制作一个所有40个水平和垂直单词都有效的单词.可用图块集包含:
这里提供有效单词词典(700KB).大约有12,000个有效的5个字母单词.
这是一个所有20个水平单词都有效的例子:
Z O W I E|P I N O T
Y O G I N|O C t A D <= blank being used as 't'
X E B E C|N A L E D
W A I T E|M E R L E
V I N E R|L U T E A
---------+---------
U S N E A|K N O S P
T A V E R|J O L E D
S O F T A|I A M B I
R I D G Y|H A I T h <= blank being used as 'h'
Q U R S H|G R O U F
我想创建一个所有垂直的也是有效的.你能帮帮我解决这个问题吗？这不是功课.这是朋友向我求助的问题.
Nul*_*Set 35
最终编辑:解决了!这是一个解决方案.
GNAWN|jOULE
RACHE|EUROS
IDIOT|STEAN
PINOT|TRAvE
TRIPY|SOLES
-----+-----
HOWFF|ZEBRA
AGILE|EQUID
CIVIL|BUXOM
EVENT|RIOJA
KEDGY|ADMAN
这是用我的拼字游戏设置的照片.http://twitpic.com/3wn7iu
一旦我采用了正确的方法,这个很容易找到,所以我打赌你可以通过这种方式找到更多.请参阅下面的方法.
从每个行和列的5个字母单词的字典构造前缀树.递归地,如果给定的图块位置为其列和行形成有效前缀,并且图块是可用的,并且下一个图块放置是有效的,则它是有效的.基本情况是,如果没有要放置的瓷砖,它是有效的.
如Glenn所说,找到所有有效的5x5电路板可能是有意义的,看看它们中是否有任何四个可以合并.递归到100的深度听起来不是很有趣.
编辑:这是我的代码的第2版.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
typedef union node node;
union node {
node* child[26];
char string[6];
};
typedef struct snap snap;
struct snap {
node* rows[5];
node* cols[5];
char tiles[27];
snap* next;
};
node* root;
node* vtrie[5];
node* htrie[5];
snap* head;
char bag[27] = {9,2,2,4,12,2,3,2,9,1,1,4,2,6,8,2,1,6,4,6,4,2,2,1,2,1,2};
const char full_bag[27] = {9,2,2,4,12,2,3,2,9,1,1,4,2,6,8,2,1,6,4,6,4,2,2,1,2,1,2};
const char order[26] = {16,23,9,25,21,22,5,10,1,6,7,12,15,2,24,3,20,13,19,11,8,17,14,0,18,4};
void insert(char* string){
node* place = root;
int i;
for(i=0;i<5;i++){
if(place->child[string[i] - 'A'] == NULL){
int j;
place->child[string[i] - 'A'] = malloc(sizeof(node));
for(j=0;j<26;j++){
place->child[string[i] - 'A']->child[j] = NULL;
}
}
place = place->child[string[i] - 'A'];
}
memcpy(place->string, string, 6);
}
void check_four(){
snap *a, *b, *c, *d;
char two_total[27];
char three_total[27];
int i;
bool match;
a = head;
for(b = a->next; b != NULL; b = b->next){
for(i=0;i<27; i++)
two_total[i] = a->tiles[i] + b->tiles[i];
for(c = b->next; c != NULL; c = c->next){
for(i=0;i<27; i++)
three_total[i] = two_total[i] + c->tiles[i];
for(d = c->next; d != NULL; d = d->next){
match = true;
for(i=0; i<27; i++){
if(three_total[i] + d->tiles[i] != full_bag[i]){
match = false;
break;
}
}
if(match){
printf("\nBoard Found!\n\n");
for(i=0;i<5;i++){
printf("%s\n", a->rows[i]->string);
}
printf("\n");
for(i=0;i<5;i++){
printf("%s\n", b->rows[i]->string);
}
printf("\n");
for(i=0;i<5;i++){
printf("%s\n", c->rows[i]->string);
}
printf("\n");
for(i=0;i<5;i++){
printf("%s\n", d->rows[i]->string);
}
exit(0);
}
}
}
}
}
void snapshot(){
snap* shot = malloc(sizeof(snap));
int i;
for(i=0;i<5;i++){
printf("%s\n", htrie[i]->string);
shot->rows[i] = htrie[i];
shot->cols[i] = vtrie[i];
}
printf("\n");
for(i=0;i<27;i++){
shot->tiles[i] = full_bag[i] - bag[i];
}
bool transpose = false;
snap* place = head;
while(place != NULL && !transpose){
transpose = true;
for(i=0;i<5;i++){
if(shot->rows[i] != place->cols[i]){
transpose = false;
break;
}
}
place = place->next;
}
if(transpose){
free(shot);
}
else {
shot->next = head;
head = shot;
check_four();
}
}
void pick(x, y){
if(y==5){
snapshot();
return;
}
int i, tile,nextx, nexty, nextz;
node* oldv = vtrie[x];
node* oldh = htrie[y];
if(x+1==5){
nexty = y+1;
nextx = 0;
} else {
nextx = x+1;
nexty = y;
}
for(i=0;i<26;i++){
if(vtrie[x]->child[order[i]]!=NULL &&
htrie[y]->child[order[i]]!=NULL &&
(tile = bag[i] ? i : bag[26] ? 26 : -1) + 1) {
vtrie[x] = vtrie[x]->child[order[i]];
htrie[y] = htrie[y]->child[order[i]];
bag[tile]--;
pick(nextx, nexty);
vtrie[x] = oldv;
htrie[y] = oldh;
bag[tile]++;
}
}
}
int main(int argc, char** argv){
root = malloc(sizeof(node));
FILE* wordlist = fopen("sowpods5letters.txt", "r");
head = NULL;
int i;
for(i=0;i<26;i++){
root->child[i] = NULL;
}
for(i=0;i<5;i++){
vtrie[i] = root;
htrie[i] = root;
}
char* string = malloc(sizeof(char)*6);
while(fscanf(wordlist, "%s", string) != EOF){
insert(string);
}
free(string);
fclose(wordlist);
pick(0,0);
return 0;
}
这首先尝试不常见的字母,我不再确定这是一个好主意.它开始陷入困境,然后从x开始走出电路板.在看到有多少5x5块后,我改变了代码,只列出了所有有效的5x5块.我现在有一个150 MB的文本文件,包含所有4,430,974个5x5解决方案.
我还尝试了通过完整的100个瓷砖递归,并且仍然在运行.
编辑2:这是我生成的所有有效5x5块的列表.http://web.cs.sunyit.edu/~levyt/solutions.rar
编辑3:嗯,我的磁贴使用情况跟踪中似乎有一个错误,因为我刚在输出文件中找到了一个使用5个Z的块.
COSTE
ORCIN
SCUZZ
TIZZY
ENZYM
编辑4:这是最终产品.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
typedef union node node;
union node {
node* child[26];
char string[6];
};
node* root;
node* vtrie[5];
node* htrie[5];
int score;
int max_score;
char block_1[27] = {4,2,0,2, 2,0,0,0,2,1,0,0,2,1,2,0,1,2,0,0,2,0,0,1,0,1,0};//ZEBRA EQUID BUXOM RIOJA ADMAN
char block_2[27] = {1,0,1,1, 4,2,2,1,3,0,1,2,0,1,1,0,0,0,0,1,0,2,1,0,1,0,0};//HOWFF AGILE CIVIL EVENT KEDGY
char block_3[27] = {2,0,1,1, 1,0,1,1,4,0,0,0,0,3,2,2,0,2,0,3,0,0,1,0,1,0,0};//GNAWN RACHE IDIOT PINOT TRIPY
//JOULE EUROS STEAN TRAVE SOLES
char bag[27] = {9,2,2,4,12,2,3,2,9,1,1,4,2,6,8,2,1,6,4,6,4,2,2,1,2,1,2};
const char full_bag[27] = {9,2,2,4,12,2,3,2,9,1,1,4,2,6,8,2,1,6,4,6,4,2,2,1,2,1,2};
const char order[26] = {16,23,9,25,21,22,5,10,1,6,7,12,15,2,24,3,20,13,19,11,8,17,14,0,18,4};
const int value[27] = {244,862,678,564,226,1309,844,765,363,4656,909,414,691,463,333,687,11998,329,218,423,536,1944,1244,4673,639,3363,0};
void insert(char* string){
node* place = root;
int i;
for(i=0;i<5;i++){
if(place->child[string[i] - 'A'] == NULL){
int j;
place->child[string[i] - 'A'] = malloc(sizeof(node));
for(j=0;j<26;j++){
place->child[string[i] - 'A']->child[j] = NULL;
}
}
place = place->child[string[i] - 'A'];
}
memcpy(place->string, string, 6);
}
void snapshot(){
static int count = 0;
int i;
for(i=0;i<5;i++){
printf("%s\n", htrie[i]->string);
}
for(i=0;i<27;i++){
printf("%c%d ", 'A'+i, bag[i]);
}
printf("\n");
if(++count>=1000){
exit(0);
}
}
void pick(x, y){
if(y==5){
if(score>max_score){
snapshot();
max_score = score;
}
return;
}
int i, tile,nextx, nexty;
node* oldv = vtrie[x];
node* oldh = htrie[y];
if(x+1==5){
nextx = 0;
nexty = y+1;
} else {
nextx = x+1;
nexty = y;
}
for(i=0;i<26;i++){
if(vtrie[x]->child[order[i]]!=NULL &&
htrie[y]->child[order[i]]!=NULL &&
(tile = bag[order[i]] ? order[i] : bag[26] ? 26 : -1) + 1) {
vtrie[x] = vtrie[x]->child[order[i]];
htrie[y] = htrie[y]->child[order[i]];
bag[tile]--;
score+=value[tile];
pick(nextx, nexty);
vtrie[x] = oldv;
htrie[y] = oldh;
bag[tile]++;
score-=value[tile];
}
}
}
int main(int argc, char** argv){
root = malloc(sizeof(node));
FILE* wordlist = fopen("sowpods5letters.txt", "r");
score = 0;
max_score = 0;
int i;
for(i=0;i<26;i++){
root->child[i] = NULL;
}
for(i=0;i<5;i++){
vtrie[i] = root;
htrie[i] = root;
}
for(i=0;i<27;i++){
bag[i] = bag[i] - block_1[i];
bag[i] = bag[i] - block_2[i];
bag[i] = bag[i] - block_3[i];
printf("%c%d ", 'A'+i, bag[i]);
}
char* string = malloc(sizeof(char)*6);
while(fscanf(wordlist, "%s", string) != EOF){
insert(string);
}
free(string);
fclose(wordlist);
pick(0,0);
return 0;
}
在找出有多少块(近20亿并且还在计数)之后,我转而试图找到某些类型的块,特别是难以使用不常见的字母构造块.我的希望是,如果我最后用一组良性的字母进入最后一个区块,那么有效区块的大量空间可能会有一组用于那组字母.
我为每个图块分配了一个与其出现的5个字母单词的数量成反比的值.然后,当我找到一个有效的块时,我会总结图块值,如果得分是我见过的最好的,我会打印街区外.
对于第一个块,我删除了空白区块,确定最后一个区块最需要这种灵活性.让它运行直到我没有看到更好的块出现一段时间后,我选择了最好的块,并从包中取出了它的瓷砖,然后再次运行程序,获得第二个块.我重复了第3次这个.然后对于最后一个块,我将空白添加回来并使用它找到的第一个有效块.