View Compilation Error

0_0_39046159_2615.cpp: In function 'int main()':
0_0_39046159_2615.cpp:19:17: error: 'n' was not declared in this scope
   19 |                 n = ceil((double)s / 9);
      |                 ^
0_0_39046159_2615.cpp:24:17: error: 'n' was not declared in this scope
   24 |                 n = ceil((double)s / 2);
      |                 ^