View Compilation Error

0_0_38796595_21896.cpp: In function 'int main()':
0_0_38796595_21896.cpp:36:55: error: 'mod' was not declared in this scope; did you mean 'modf'?
   36 |                                 y=(y*k[x][i]+b[x][i])%mod;
      |                                                       ^~~
      |                                                       modf