View Compilation Error

0_0_39035081_28519.cpp: In function 'int main()':
0_0_39035081_28519.cpp:17:46: error: 'st' was not declared in this scope; did you mean 't'?
   17 |                                         if(((st>>j)&1) && s[j][k]=='A')sum|=(1<<j);
      |                                              ^~
      |                                              t
0_0_39035081_28519.cpp:22:38: error: 'pre' was not declared in this scope
   22 |                                 sum+=pre*cnt[i];
      |                                      ^~~
0_0_39035081_28519.cpp:25:33: error: 'k' was not declared in this scope
   25 |                         if(sum>=k)ans++;
      |                                 ^