answer.code:6:19: error: expected ‘]’ before ‘;’ token
    6 | #define maxn 10000;
      |                   ^
answer.code:7:11: note: in expansion of macro ‘maxn’
    7 | double dp[maxn];
      |           ^~~~
answer.code:7:15: error: expected unqualified-id before ‘]’ token
    7 | double dp[maxn];
      |               ^
answer.code: In function ‘int main()’:
answer.code:27:17: error: ‘dp’ was not declared in this scope
   27 |                 dp[0]=1;
      |                 ^~