View Compilation Error

0_0_15066199_2995.cpp: In function 'int main()':
0_0_15066199_2995.cpp:37:30: error: 'a' was not declared in this scope
         for(int i=0;i<n;i++) a[i]=in();
                              ^
0_0_15066199_2995.cpp:41:21: error: 'a' was not declared in this scope
             if(ans==a[i]) ans--;
                     ^