foo.cc: In function ‘int main()’:
foo.cc:7:10: error: incompatible types in assignment of ‘int’ to ‘int [200005]’
    7 |         n=a;
      |         ~^~
foo.cc:8:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    8 |         for(int i=1;i<=n;i++)
      |                     ~^~~
foo.cc:11:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   11 |         for(int i=1;i<=n;i++)
      |                     ~^~~