View Compilation Error

0_0_31221551_17959.cpp:3:7: error: 'll' does not name a type
 const ll mod=998244353;
       ^
0_0_31221551_17959.cpp: In function 'int main()':
0_0_31221551_17959.cpp:34:41: error: 'mod' was not declared in this scope
      (dp[p][j][k][h]+=dp[p^1][j][k][h])%mod;
                                         ^
0_0_31221551_17959.cpp:65:30: error: 'mod' was not declared in this scope
       (ans+=dp[p][j][k][h])%=mod;
                              ^