View Compilation Error

0_0_39645373_6994.cpp: In function 'void build(int&, int, int)':
0_0_39645373_6994.cpp:19:18: error: 'lc' was not declared in this scope; did you mean 'l'?
   19 |         tag[x] = lc[x] = rc[x] =  0;
      |                  ^~
      |                  l
0_0_39645373_6994.cpp:19:26: error: 'rc' was not declared in this scope; did you mean 'r'?
   19 |         tag[x] = lc[x] = rc[x] =  0;
      |                          ^~
      |                          r