/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:24:21: error: expected ']' before ')' token
   if(!z[g][dao[from]){
                     ^
/in/foo.cc:31:11: error: a function-definition is not allowed here before '{' token
 int main(){
           ^
/in/foo.cc:64:1: error: expected '}' at end of input
 }
 ^