View Compilation Error

0_0_25341141_22554.cpp:1:2: error: stray '#' in program
 a#include<bits/stdc++.h>
  ^
0_0_25341141_22554.cpp:1:1: error: 'a' does not name a type
 a#include<bits/stdc++.h>
 ^
0_0_25341141_22554.cpp: In member function 'bool st::operator<(const st&) const':
0_0_25341141_22554.cpp:15:30: error: 'const struct st' has no member named 'lenc'
   if(len!=a.len)return len<a.lenc;
                              ^
0_0_25341141_22554.cpp: At global scope:
0_0_25341141_22554.cpp:20:11: error: 'string' was not declared in this scope
 ull hashs(string &s)
           ^
0_0_25341141_22554.cpp:20:19: error: 's' was not declared in this scope
 ull hashs(string &s)
                   ^
0_0_25341141_22554.cpp:21:1: error: expected ',' or ';' before '{' token
 {
 ^