/in/foo.cc:13:1: error: 'stack' does not name a type
 stack<int>T;
 ^~~~~
/in/foo.cc: In function 'void Get_String(int)':
/in/foo.cc:107:19: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   while(c=getchar())
                   ^
/in/foo.cc:101:10: warning: unused variable 'z' [-Wunused-variable]
  int p,t,z=k,x,d=FIND(now+1,Root);
          ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:159:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
      while(c=getchar())
                      ^
/in/foo.cc: In function 'int FIND(int, int)':
/in/foo.cc:97:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^