View Compilation Error

0_0_25932238_19730.cpp: In function 'void update_max(int, int, int, int, int)':
0_0_25932238_19730.cpp:75:26: error: 'ls' was not declared in this scope
   update_max(L, C, l, m, ls);
                          ^
0_0_25932238_19730.cpp:78:30: error: 'rs' was not declared in this scope
   update_max(L, C, m + 1, r, rs);
                              ^