/in/foo.cc: In function 'bool kp(int, int)':
/in/foo.cc:14:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    return aa[i]<aa[j]||aa[i]==aa[j]&&i<j;  
                        ~~~~~~~~~~~~^~~~~
/in/foo.cc: In function 'bool kp1(int, int)':
/in/foo.cc:18:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    return bb[i]<bb[j]||bb[i]==bb[j]&&i<j;  
                        ~~~~~~~~~~~~^~~~~