View Compilation Error

0_0_29484158_14698.cpp:3:7: error: 'll' does not name a type
 const ll MOD = 998244353L;
       ^
0_0_29484158_14698.cpp: In function 'int main()':
0_0_29484158_14698.cpp:31:21: error: 'MOD' was not declared in this scope
   ll pa = ksm(2, a, MOD);
                     ^