View Compilation Error

0_0_28765777_23026.cpp: In function 'int main()':
0_0_28765777_23026.cpp:29:28: error: redeclaration of 'long long int ans'
         ll l=0,r=100000000,ans=-1;
                            ^
0_0_28765777_23026.cpp:25:12: note: 'long long int ans' previously declared here
         ll ans=0;
            ^