View Compilation Error

0_0_38926116_3066.cpp:5:7: error: 'N' was not declared in this scope
    5 | int a[N];
      |       ^
0_0_38926116_3066.cpp: In function 'int main()':
0_0_38926116_3066.cpp:15:45: error: 'a' was not declared in this scope
   15 |         for(int i = 1; i <= n; i ++) cin >> a[i];
      |                                             ^
0_0_38926116_3066.cpp:16:14: error: 'a' was not declared in this scope
   16 |         sort(a+1, a+n+1);
      |              ^