View Compilation Error

0_0_39063008_5952.cpp: In function 'int hanoi(int, long long unsigned int)':
0_0_39063008_5952.cpp:5:13: error: 'a' was not declared in this scope
    5 |     if (m > a[n - 1])
      |             ^
0_0_39063008_5952.cpp:11:9: error: 'r' was not declared in this scope
   11 |         r = n;
      |         ^