circle

import sys
import random
import heapq
# import cProfile

def circleMST(n):

    E = [-2] * (n - 1)
    for i in range((n - 1) * (n - 2) / 2):
        d = random.uniform(0, 2)
        if d < -E[0]:
            heapq.heappop(E)
            heapq.heappush(E, -d)
    print -sum(E)

if __name__ == "__main__":
    if len(sys.argv) > 1:
        testMST(int(sys.argv[1]))
    else:
        print("No valid argument")
        # cProfile.run('circleMST(10000)')