View Compilation Error

0_0_38901793_16896.cpp: In function 'int main()':
0_0_38901793_16896.cpp:16:44: error: 'a' was not declared in this scope
   16 |                 for(int i=0;i<n;i++) dp[i]=a[i];//每次都要初始化！！
      |                                            ^