#!/usr/bin/env python
import sys
import time
import os
def main():
args = sys.argv[1:]
if len(args) < 1:
print("usage: %s COMMAND" % sys.argv[0])
sys.exit(1)
cmd = ' '.join(args)
t1 = time.time()
os.system(cmd)
t2 = time.time()
print(t2-t1)
if __name__ == "__main__":
main()