#program to add minutes and seconds

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

min = min1 + min2
sec = sec1 + sec2
min = min + (sec/60)
sec = sec % 60

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


# looping version.

min,sec = 0,0    # initialize running sums
min1,sec1 = 1,1  # must initialize so while loop will start.

while min1!=0 or sec1!=0  # while "or" instead of "and"?
    min1,sec1 = input("Enter minutes, seconds, 0,0 to stop: ")
    min = min + min1
    sec = sec + sec1
    min = min + (sec/60)
    sec = sec % 60
    print "sum = ",min," minutes ",sec," seconds"
#end while loop: comments like this help with the indentation.



##### version that also adds hours:

h1,m1,s1 = input("Enter hours, minutes, seconds: ")
h2,m2,s2 = input("Enter hours, minutes, seconds: ")

## I will use a different algorithm this time: first, convert all
# values to seconds, then figure out how many hours, minutes and seconds
# there are overall:

sec = s1 + m1*60 + h1*60*60 + s2 + m2*60 + h2*60*60
min = sec/60
sec = sec % 60
hr = min/60
min = min % 60

print "sum =", hr, "hours,", min, "minutes and", sec, "seconds"