run

#!/bin/python3


from inginious import input, feedback, rst

# random input
km = 10*int(input.get_input("@random")[0] * 200 + 10)   #km
bw = int(input.get_input("@random")[1] * 50 + 5)  # Mbps


def isfloat(value):
  try:
    float(value)
    return True
  except:
    return False

def almost(answer,value):
	if((answer<=(value+value/20)) and (answer>=(value-value/20))):
		return True
	else:	
		return False

# length of data frame
dlen=1000
# length of control frame
clen=40
#propagation delay in msec
prop=km*5/1000


rtt=1000*(dlen/(bw*1000000)+0.0001+clen/(bw*1000000)+2*prop)

grade=0
answer1 = input.get_input("q1")
answer2 = input.get_input("q2")


if(isfloat(answer1)):
  if (almost(float(answer1),prop)):
    feedback.set_problem_result("success","q1")
    feedback.set_problem_feedback("Correct","q1")
    grade+=30
  else:
    feedback.set_problem_result("failed","q1")
    response="Your answer is incorrect.\n"
    if(almost(float(answer1),1000*prop)):
      response+="Remember that propagation delay is in microseconds per kilometer while your answer must be in milliseconds.\n"
      feedback.set_problem_feedback(response,"q1")
    else:
      feedback.set_problem_result("failed","q1")
      feedback.set_problem_feedback("Your answer is not a number","q1")


if(isfloat(answer2)):
  if (almost(float(answer2),rtt)):
    feedback.set_problem_result("success","q2")
    feedback.set_problem_feedback("Correct","q2")
    grade+=70
  else:
    feedback.set_problem_result("failed","q2")
    response="Your answer is incorrect.\n"
    if(almost(float(answer2),1000*rtt)):
      response+="Remember that the round-trip-time must be expressed in milliseconds.\n"
    if(almost(float(answer2),rtt-2*prop)):
      response+="Remember that the round-trip-time includes both the time to transmit the data and control frames and twice the propagation delay.\n"

    feedback.set_problem_feedback(response,"q2")      
else:
  feedback.set_problem_result("failed","q2")
  feedback.set_problem_feedback("Your answer is not a number.","q2")



feedback.set_grade(grade)        
if(grade>50):
  feedback.set_global_result("success")
else:
  feedback.set_global_result("failed")