View Compilation Error

0_0_36661653_4745.cpp: In function 'int main()':
0_0_36661653_4745.cpp:20:6: error: redeclaration of 'll ans'
   ll ans = 0;
      ^
0_0_36661653_4745.cpp:14:18: note: 'll ans' previously declared here
   ll n, all = 0, ans = 0;
                  ^