View Compilation Error

0_0_39454464_24372.cpp: In function 'int main()':
0_0_39454464_24372.cpp:250:17: error: 'inv' was not declared in this scope; did you mean 'int'?
  250 |                 inv[i][j]=fastpow(c[i][j],mod1-2,mod1);
      |                 ^~~
      |                 int
0_0_39454464_24372.cpp:250:27: error: 'fastpow' was not declared in this scope
  250 |                 inv[i][j]=fastpow(c[i][j],mod1-2,mod1);
      |                           ^~~~~~~