View Compilation Error

0_0_18318130_16028.cpp: In function 'void dfs(int, int, int)':
0_0_18318130_16028.cpp:36:6: error: declaration of 'int t' shadows a parameter
  int t =space;
      ^
0_0_18318130_16028.cpp:40:6: error: 'arr' was not declared in this scope
   t-=arr[index].cost;
      ^