#program to add minutes and seconds (Python 3 version)

min1,sec1 = eval(input("Enter minutes, seconds: "))
min2,sec2 = eval(input("Enter minutes, seconds: "))

min = min1 + min2
sec = sec1 + sec2
min = min + (sec//60)  # note //, not /, which returns float
sec = sec % 60

print("sum = ",min,"minutes",sec,"seconds")


### EXERCISE: modify this program to work with hours:

# hr1,min1,sec1 = eval(input("Enter hours, minutes, seconds: "))

#### Version of program that keeps adding minutes, seconds until 0,0 used:

tmin, tsec = 0,0   # total number of minutes and seconds being kept
min,sec = 0,1      # user input (must not be 0,0 for loop to start)
while (min!=0 or sec !=0):  # equivalent to not(min==0 and sec==0)
  min,sec = eval(input("Enter minutes, seconds to add (0,0 to quit): "))
  tsec = tsec + sec + min*60  # math equivalent to above
  tmin = tmin + (tsec//60)
  tsec = tsec % 60
# while
print("Total time is",tmin,"minutes,",tsec,"seconds")