/in/foo.cc: In function 'int main()':
/in/foo.cc:11:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |                         if(i<=n&&j<=n-i+1||j>=n+i-1)
      |                            ~~~~^~~~~~~~~~
/in/foo.cc:14:39: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   14 |                                 if(i>n&&j>=i-n+1||j<=2*n-1-(i-n))
      |                                    ~~~^~~~~~~~~~