View Compilation Error

0_0_30421684_10298.cpp: In function 'int main()':
0_0_30421684_10298.cpp:57:10: error: redeclaration of 'int ans'
      int ans=0;
          ^
0_0_30421684_10298.cpp:28:14: note: 'int ans' previously declared here
         }int ans=0;
              ^