View Compilation Error

0_0_33668704_20363.cpp: In function 'int main()':
0_0_33668704_20363.cpp:10:10: error: 'ans' was not declared in this scope
          ans=(ans*i)%2009;
          ^
0_0_33668704_20363.cpp:11:15: error: 'ans' was not declared in this scope
         cout<<ans<<endl;
               ^