/in/foo.cc:24:1: error: 'map' does not name a type
 map<string,int> Hash;
 ^~~
/in/foo.cc: In function 'void init()':
/in/foo.cc:44:12: error: 'Hash' was not declared in this scope
         if(Hash[a])
            ^~~~
/in/foo.cc:57:12: error: 'Hash' was not declared in this scope
         if(Hash[a]&&Hash[b])
            ^~~~