View Compilation Error

0_0_39828668_8493.cpp: In function 'll power_mod(ll, ll)':
0_0_39828668_8493.cpp:11:10: error: 'mod_val' was not declared in this scope; did you mean 'modfl'?
   11 |     x %= mod_val;
      |          ^~~~~~~
      |          modfl
0_0_39828668_8493.cpp: In function 'int main()':
0_0_39828668_8493.cpp:39:13: error: expected '}' before 'else'
   39 |             else
      |             ^~~~
0_0_39828668_8493.cpp:37:29: note: to match this '{'
   37 |             if (n - 1 >= 0) {
      |                             ^