View Compilation Error

0_0_39284230_27348.cpp: In function 'int main()':
0_0_39284230_27348.cpp:21:50: error: 'inv' was not declared in this scope; did you mean 'int'?
   21 |                         now = now * (jc[x - 2] * inv[i - 2] % p * inv[x - i])% p;
      |                                                  ^~~
      |                                                  int