/in/foo.cc: In function 'bool cmp(std::pair<int, int>, std::pair<int, int>)':
/in/foo.cc:7:42: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  return a.first>b.first||a.first==b.first&&a.second<b.second;
                          ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~