View Compilation Error

0_0_29928302_507.cpp: In function 'int main()':
0_0_29928302_507.cpp:106:8: error: redeclaration of 'int ans'
    int ans=1;
        ^
0_0_29928302_507.cpp:105:8: note: 'int ans' previously declared here
    int ans=ask(troot[rec[x]],1,n,y,x);
        ^