View Compilation Error

0_0_33987909_14709.cpp: In function 'int main()':
0_0_33987909_14709.cpp:24:15: error: conflicting declaration 'int k'
  register int k,cnt,ct;
               ^
0_0_33987909_14709.cpp:23:18: note: previous declaration as 'll k'
  register ll i,j,k,x;t=1;
                  ^