[USACO4.3.4 Letter Game]

[关键字]：枚举

[题目大意]：给出每个字母的分数，

//================================================================================================================

[分析]：一开始想了半天hash也没想对，这题居然枚举就能做。虽然给出的字典很大，但是其实有用的词很少。只要在读入字典时判断一下是否是由给出的字符中的一些组成，然后之久枚举超找最大值和词组就行。

[代码]：

View Code

/*

ID:procedure2

PROB:lgame

LANG:C++

*/

#include<iostream>

#include<cstdio>

#include<cstdlib>

#include<cstring>

#include<algorithm>

using namespace std;



const int value[26]={2,5,4,4,1,6,5,5,1,7,6,3,5,2,3,5,7,2,1,2,4,6,6,7,5,7};



int tot,a[26],b[26],ans,sum;

char s[10],s1[20],s2[20][20],word[40000][10];



bool Cleck(char *s)

{

     int len=strlen(s);

     memcpy(b,a,sizeof(a));

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

         if (s[i]!=' ') b[s[i]-'a']--;

     for (int i=0;i<26;i++)

         if (b[i]<0) return 0;

     return 1;

}



void Init()

{

     freopen("lgame.in","r",stdin);

     freopen("lgame.out","w",stdout);     

     scanf("%s",s);

     for (int i=0;i<strlen(s);i++) a[s[i]-'a']++;

     fclose(stdin);

     freopen("lgame.dict","r",stdin);

     while (1)

     {

           scanf("%s",s1);           

           //printf("%s\n",s1);

           if (s1[0]=='.') break;

           if (Cleck(s1)) strcpy(word[++tot],s1);

     }

     fclose(stdin);

     //printf("%d\n",tot);

     //for (int i=1;i<=tot;i++) printf("%s\n",word[i]);

}



int sorce(char *s)

{

    int sum=0;

    for (int i=0;i<strlen(s);i++)

        if (s[i]!=' ') sum+=value[s[i]-'a'];

    return sum;

}



bool cmp(char *a,char *b)

{

     if (strcmp(a,b)<0) return 1; else return 0;

}



void Solve()

{

     for (int i=1;i<=tot;i++)

     {

         int temp=sorce(word[i]);

         if (temp==ans) strcpy(s2[++sum],word[i]);

         if (temp>ans) ans=temp,strcpy(s2[sum=1],word[i]);         

     }

     for (int i=1;i<tot;i++)

        for (int j=i+1;j<=tot;j++)

        {

                 strcpy(s1,word[i]);

                 strcat(s1," ");

                 strcat(s1,word[j]);

                 //printf("%s\n",s1);

                 if (!Cleck(s1)) continue;

                 int temp=sorce(s1);

                 if (temp==ans) strcpy(s2[++sum],s1);

                 if (temp>ans) ans=temp,strcpy(s2[sum=1],s1); 

        }

     printf("%d\n",ans);

     for (int i=1;i<sum;i++)

         for (int j=i+1;j<=sum;j++)

             if (strcmp(s2[i],s2[j])>0)

             {

                                       strcpy(s1,s2[i]);

                                       strcpy(s2[i],s2[j]);

                                       strcpy(s2[j],s1);

             }

     for (int i=1;i<=sum;i++) printf("%s\n",s2[i]);

}



int main()

{

    Init();

    Solve();

    return 0;

}