View Compilation Error

0_0_23886360_12006.cpp: In function 'int main()':
0_0_23886360_12006.cpp:30:9: error: 'll' was not declared in this scope
         ll ans=(n*(n-1)/2-Eular(n)*n/2)%1000000007;
         ^
0_0_23886360_12006.cpp:31:15: error: 'ans' was not declared in this scope
         cout<<ans<<"\n";
               ^