#include <set>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define TRIAL_SIZE 3000000
#define INFINITY 2000000000

int main (void) {
  std::set<int> s;

  srand(time(NULL));

  for (int i = 0; i < TRIAL_SIZE; i++) {
    s.insert(rand() % INFINITY);
    s.find(rand() % INFINITY);
  }
}