using namespace std;
#include <cstdio>
#include <vector>
#include <cstdlib>
#include <ctime>
#define maxn 100003
#define maxlog 17
#define pb push_back
vector<int> H[maxn][maxlog];

inline void insert(int v)
{
	int h1=(v%maxn);
	int h2=(v%maxlog);
	H[h1][h2].pb(v);
}

inline int find(int v)
{
	vector<int>::iterator it, last;
	int h1=(v%maxn);
	int h2=(v%maxlog);
	for(it=H[h1][h2].begin(), last=H[h1][h2].end(); it!=last;++it)
		if(*it==v)return 1;
return 0;
}


int main()
{
	srand(time(0));
	double start=clock();
	for(int i=1;i<=1000000;++i) insert(rand());
	for(int i=1;i<=1000000;++i) find(rand());
	
	printf("%lf\n", (clock()-start)/(double)CLOCKS_PER_SEC);
	return 0;
}