View Compilation Error

0_0_25824656_4338.cpp: In function 'int main()':
0_0_25824656_4338.cpp:50:13: error: redeclaration of 'int ans'
         int ans=0;
             ^
0_0_25824656_4338.cpp:45:13: note: 'int ans' previously declared here
         int ans=0;
             ^