View Compilation Error

0_0_39513564_28149.cpp: In function 'void solve()':
0_0_39513564_28149.cpp:63:18: error: 'k' was not declared in this scope
   63 |                 {k
      |                  ^
0_0_39513564_28149.cpp:67:26: error: expected '}' before 'else'
   67 |                         }else cout<<"0"<<endl;
      |                          ^~~~
0_0_39513564_28149.cpp:63:17: note: to match this '{'
   63 |                 {k
      |                 ^
0_0_39513564_28149.cpp:68:18: error: 'else' without a previous 'if'
   68 |                 }else{
      |                  ^~~~
0_0_39513564_28149.cpp:69:45: error: 'l' was not declared in this scope
   69 |                         if(zero.upper_bound(l)!=zero.upper_bound(r))cout<<"0"<<endl;
      |                                             ^
0_0_39513564_28149.cpp:69:66: error: 'r' was not declared in this scope
   69 |                         if(zero.upper_bound(l)!=zero.upper_bound(r))cout<<"0"<<endl;
      |                                                                  ^
0_0_39513564_28149.cpp: At global scope:
0_0_39513564_28149.cpp:84:1: error: expected declaration before '}' token
   84 | }
      | ^