View Compilation Error

0_0_39582386_5049.cpp: In function 'void kmp()':
0_0_39582386_5049.cpp:22:33: error: 'nxt' was not declared in this scope; did you mean 'nx'?
   22 |                 if (k == n) k = nxt[k];
      |                                 ^~~
      |                                 nx
0_0_39582386_5049.cpp:23:51: error: 'nxt' was not declared in this scope; did you mean 'nx'?
   23 |                 while (k && b[i] != a[k + 1]) k = nxt[k];
      |                                                   ^~~
      |                                                   nx