template<typename T1, typename T2>
bool operator<(const pair<T1, T2> &lhs, const pair<T1, T2> &rhs)
{
return lhs.first < rhs.first || (!(rhs.first < lhs.first) && lhs.second < rhs.second);
}http://bbs.csdn.net/topics/390258323
template<typename T1, typename T2>
bool operator<(const pair<T1, T2> &lhs, const pair<T1, T2> &rhs)
{
return lhs.first < rhs.first || (!(rhs.first < lhs.first) && lhs.second < rhs.second);
}http://bbs.csdn.net/topics/390258323
