View Compilation Error

0_0_36852724_15078.cpp: In function 'int main()':
0_0_36852724_15078.cpp:48:6: error: redeclaration of 'll ans'
   ll ans=d[1];
      ^
0_0_36852724_15078.cpp:29:6: note: 'll ans' previously declared here
   ll ans = 0;
      ^