View Compilation Error

0_0_39424160_7301.cpp: In function 'void Calc(long long int)':
0_0_39424160_7301.cpp:65:34: error: 'Inv' was not declared in this scope; did you mean 'INV'?
   65 |                         int xx=m*Inv[d[tmp[j]]]%mod,yy;
      |                                  ^~~
      |                                  INV
0_0_39424160_7301.cpp:67:25: error: 'yy' was not declared in this scope; did you mean 'y'?
   67 |                         yy=tmp[j];xx=vis[xx];
      |                         ^~
      |                         y
0_0_39424160_7301.cpp: In function 'int main()':
0_0_39424160_7301.cpp:97:31: error: 'Inv' was not declared in this scope; did you mean 'INV'?
   97 |         for(int i=1;i<mod;i++)Inv[i]=INV(i);
      |                               ^~~
      |                               INV