#include <iostream>
#include <map>
using namespace std;

int P;
int count = 0;

int main(int argc, char* argv[])
{
	map<int, int> book;
	cin>>P;
	int index = 0;
	while(index < P)
	{
		int a;
		cin>>a;
		if(book.find(a) == book.end())
		{
			book[a] = a;
			count++;
		}
		index++;
	}

	cout<<count<<endl;
	return 0;
}

• Re:这样写行不行？不过wa (399) goodpeter 2007-08-24 17:52:24
  • Re:这样写行不行？不过wa (9) goodpeter 2007-08-24 17:52:53