View Compilation Error

0_0_29882756_24837.cpp: In function 'int main()':
0_0_29882756_24837.cpp:98:45: error: 'arr' was not declared in this scope
         for(int i=2; i<=n; i++) scanf("%d",&arr[i]);
                                             ^
0_0_29882756_24837.cpp:106:17: error: 'arr' was not declared in this scope
             x = arr[i];
                 ^