View Compilation Error

0_0_39403747_11865.cpp: In function 'int main()':
0_0_39403747_11865.cpp:60:60: error: 'a' was not declared in this scope; did you mean 'aa'?
   60 |         for(int i=1;i<=n;i++) if(t[i]==0) {int aa[3000000];a[0]++;}
      |                                                            ^
      |                                                            aa