/in/foo.c: In function 'main':
/in/foo.c:33:108: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
                             if((x<=p&&x+k-1>=p&&y<=q+k-1)||(x>=p&&x<=p+k-1&&y<=q+k-1)||(y<q||x<=i&&x+k-1>=i&&y<=j+k-1)||(x>=i&&x<=i+k-1&&y<=i+k-1))
                                                                                              ~~~~~~~~~~~~~~^~~~~~~~~~