/in/foo.cc: In function 'int main()':
/in/foo.cc:36:66: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if( (a[j - 1] > a[j] && a[j] > a[j + 1]) || a[j - 1] == a[j] && a[j] == a[j + 1])
                                                 ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~