更新时间:2018-03-25 21:40:30浏览次数:1+次
// ====================方法2====================
typedef multiset<int, std::greater<int> > intSet;
typedef multiset<int, std::greater<int> >::iterator setIterator;
void GetLeastNumbers_Solution2(const vector<int>& data, intSet& leastNumbers, int k)
{
leastNumbers.clear();
if(k < 1 || data.size() < k)
return;
vector<int>::const_iterator iter = data.begin();
for(; iter != data.end(); ++ iter)
{
if((leastNumbers.size()) < k)
leastNumbers.insert(*iter);
else
{
setIterator iterGreatest = leastNumbers.begin();
if(*iter < *(leastNumbers.begin()))
{
leastNumbers.erase(iterGreatest);
leastNumbers.insert(*iter);
}
}
}
}
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