View Compilation Error

0_0_36521201_21411.cpp: In function 'int main()':
0_0_36521201_21411.cpp:16:2: error: expected ';' before 'cin'
  cin.tie(0);
  ^
0_0_36521201_21411.cpp:23:9: error: 'll' was not declared in this scope
         ll ans = 0;
         ^
0_0_36521201_21411.cpp:28:13: error: 'ans' was not declared in this scope
             ans = (ans + dp[i]) % mod;
             ^
0_0_36521201_21411.cpp:30:26: error: 'ans' was not declared in this scope
         printf("%lld\n", ans);
                          ^