USACO 1.3 Name That Number【暴搜】

裸的穷举搜索。

研究了好久怎么输入$dict.txt$,$USACO$好像对$freopen$的顺序还有要求？

 /*
 ID: Starry21
 LANG: C++
 TASK: namenum
 */
 #include<iostream>
 #include<string>
 #include<cstdio>
 #include<cstring>
 #include<map>
 #include<algorithm>
 using namespace std;
 #define N 4617
 map<string,bool> vis;
 char a[];
 string s[];
 int len;
 bool f=;
 void dfs(int i,string n)
 {
     if(i>len)
     {
         //cout<<n<<endl;
         if(vis[n])
         {
             f=;
             cout<<n<<endl;
         }
         return ;
     }
     int t=a[i]-'';
     for(int k=;k<=;k++)
         dfs(i+,n+s[t][k]);
 }
 int main()
 {
     freopen("namenum.in","r",stdin);
     freopen("namenum.out","w",stdout);
     s[]="ABC",s[]="DEF",s[]="GHI",s[]="JKL";
     s[]="MNO",s[]="PRS",s[]="TUV",s[]="WXY";
     scanf("%s",a+);
     string t;
     freopen("dict.txt","r",stdin);
     for(int i=;i<=N;i++)
     {
         cin>>t;
         vis[t]=;
     }
     len=strlen(a+);
     //printf("%d\n",len);
     dfs(,"");
     if(f==) puts("NONE");
     return ;
 }