以下皆 using namespace std;
#include <algorithm>
sort
lower_bound
upper_bound
make_heap
push_heap
pop_heap
sort_heap
#include <vector>
vector
#include <string>
string
#include <map>
map
#include <set>
set
#include <stringstream>
stringstream
#include <algorithm>
sort
lower_bound
upper_bound
make_heap
push_heap
pop_heap
sort_heap
#include <vector>
vector
#include <string>
string
#include <map>
map
#include <set>
set
#include <stringstream>
stringstream