View Compilation Error

0_0_38732175_19396.cpp: In function 'int C()':
0_0_38732175_19396.cpp:11:10: error: 'f' was not declared in this scope
   11 |     if (!f[i]) {
      |          ^
0_0_38732175_19396.cpp:12:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   12 |       ans++;
      |       ^~~
      |       abs
0_0_38732175_19396.cpp: In function 'void Solve()':
0_0_38732175_19396.cpp:22:18: error: 'f' was not declared in this scope
   22 |     cin >> a[i], f[i] = 0;
      |                  ^