View Compilation Error

0_0_39648943_14956.cpp: In function 'void solve()':
0_0_39648943_14956.cpp:54:35: error: 'mod1' was not declared in this scope; did you mean 'modf'?
   54 |                 hs1[i]=hs1[i-1]*P%mod1+s[i];
      |                                   ^~~~
      |                                   modf
0_0_39648943_14956.cpp:58:35: error: 'mod1' was not declared in this scope; did you mean 'modf'?
   58 |                 ht1[i]=ht1[i-1]*P%mod1+t[i];
      |                                   ^~~~
      |                                   modf