View Compilation Error

0_0_17231303_25547.cpp: In function 'int main()':
0_0_17231303_25547.cpp:41:9: error: 'll' was not declared in this scope
         ll ans=0;
         ^
0_0_17231303_25547.cpp:43:13: error: 'ans' was not declared in this scope
             ans+=i*dp[n][i]%mod;
             ^
0_0_17231303_25547.cpp:44:25: error: 'ans' was not declared in this scope
         printf("%lld\n",ans);
                         ^