/in/foo.cc: In function 'int main()':
/in/foo.cc:13:2: error: expected ';' before 'for'
  for(int i=1;i<=n;i++)
  ^~~
/in/foo.cc:13:14: error: 'i' was not declared in this scope
  for(int i=1;i<=n;i++)
              ^
/in/foo.cc:14:15: error: 'j' was not declared in this scope
   for(int j=m;j>=a[i];j--)
               ^