View Compilation Error

0_0_30209498_24697.cpp: In function 'int f(ll, ll)':
0_0_30209498_24697.cpp:8:5: error: conflicting declaration 'int i'
 int i;
     ^
0_0_30209498_24697.cpp:7:10: note: previous declaration as 'll i'
 ll ans=0,i;
          ^