View Compilation Error

0_0_39327097_17563.cpp: In function 'long long unsigned int C(long long unsigned int, long long unsigned int)':
0_0_39327097_17563.cpp:10:26: error: expected unqualified-id before '=' token
   10 |         for (unsigned ll = 2; i <= m; ++i) b *= i;
      |                          ^
0_0_39327097_17563.cpp:10:26: error: expected ';' before '=' token
0_0_39327097_17563.cpp:10:26: error: expected primary-expression before '=' token
0_0_39327097_17563.cpp:10:31: error: 'i' was not declared in this scope
   10 |         for (unsigned ll = 2; i <= m; ++i) b *= i;
      |                               ^
0_0_39327097_17563.cpp:10:37: error: expected ')' before ';' token
   10 |         for (unsigned ll = 2; i <= m; ++i) b *= i;
      |             ~                       ^
      |                                     )
0_0_39327097_17563.cpp:10:41: error: 'i' was not declared in this scope
   10 |         for (unsigned ll = 2; i <= m; ++i) b *= i;
      |                                         ^