View Compilation Error

0_0_39769927_13402.cpp: In function 'void solve()':
0_0_39769927_13402.cpp:18:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   18 |                 ans=0;
      |                 ^~~
      |                 abs
0_0_39769927_13402.cpp:26:28: error: 'pl' was not declared in this scope; did you mean 'l'?
   26 |                         if(pl==pr) {
      |                            ^~
      |                            l
0_0_39769927_13402.cpp:26:32: error: 'pr' was not declared in this scope; did you mean 'r'?
   26 |                         if(pl==pr) {
      |                                ^~
      |                                r