View Compilation Error

0_0_25496595_11893.cpp: In function 'int main()':
0_0_25496595_11893.cpp:16:8: error: conflicting declaration 'll ans'
     ll ans;
        ^
0_0_25496595_11893.cpp:15:9: note: previous declaration as 'int ans'
     int ans,l,r,t,k;
         ^