View Compilation Error

0_0_36645838_2785.cpp: In function 'int main()':
0_0_36645838_2785.cpp:42:31: error: 'ans' was not declared in this scope
         for(int i=n;i>=1;i--) ans+=1ull*res[i]*t,t*=23333ull;
                               ^
0_0_36645838_2785.cpp:42:48: error: 't' was not declared in this scope
         for(int i=n;i>=1;i--) ans+=1ull*res[i]*t,t*=23333ull;
                                                ^
0_0_36645838_2785.cpp:43:15: error: 'ans' was not declared in this scope
         cout<<ans<<endl;
               ^