View Compilation Error

0_0_29998721_15113.cpp: In function 'int main()':
0_0_29998721_15113.cpp:54:32: error: 'arr' was not declared in this scope
             int it=upper_bound(arr+1,arr+1+len,a[i])-arr;
                                ^
0_0_29998721_15113.cpp:68:32: error: 'arr' was not declared in this scope
             int it=upper_bound(arr+1,arr+1+len,a[i])-arr;
                                ^