寻找热门查询，300万个查询字符串中统计最热门的10个查询

#include 
   
   
    
    
#include 
    
    
     
     
#include 
     
     
      
      

struct QueryInfo{
	string s;
	int times;
	QueryInfo(string s1, int t): s(s1), times(t){}
};

int QueryCompare(const QueryInfo &q1, const QueryInfo &q2)
{
	return q1.times < q2.times;
}
void FindHottest(vector
      
      
       
        &s)
{
	hash_map
       
       
         table; int size = s.size(); for (int i = 0; i < size; ++i) { if (table.find(s[i]) == table.end()) { table[s[i]] = 1; }else ++table[s[i]]; } vector 
        
          heap; auto it = table.begin(); for (int i = 0; it != table.end() && i < 10; ++it, ++i) { QueryInfo temp(it->first, it->second); heap.push_back(temp); } make_heap(heap.begin(), heap.end(), QueryCompare); if (it == table.end()) return; for ( ; it != table.end(); ++it) { if (it->second > heap[0].times){ pop_heap(heap.begin(), heap.end(), QueryCompare); heap.pop_back(); heap.push_back(QueryInfo(it->first, it->second)); push_heap(heap.begin(), heap.end(), QueryCompare); } } for (auto it2 = heap.begin(); it2 != heap.end(); ++it2) { cout << it2->s <<" "< 
         
           times< 
          
            s(t, t+sizeof(t)/sizeof(string)); FindHottest(s); }