View Compilation Error

0_0_39142097_1149.cpp: In member function 'int Segment_Tree::query(int, int, int, int)':
0_0_39142097_1149.cpp:49:22: error: 'rs' was not declared in this scope
   49 |                 if(c[rs]>=k)return query(rs,mid+1,r,k);
      |                      ^~
0_0_39142097_1149.cpp:50:30: error: 'ls' was not declared in this scope
   50 |                 return query(ls,l,mid,k-c[rs]);
      |                              ^~
0_0_39142097_1149.cpp:50:43: error: 'rs' was not declared in this scope
   50 |                 return query(ls,l,mid,k-c[rs]);
      |                                           ^~