#look at the code and figure out what it does
#then run it

#then uncomment the next SECTION
#look at the code and figure out what it does
#then run it
#repeat

testScores = [[45, 76, 32, 98, 0], [67, 34, 56, 23, 7], [0, 0, 0, 65, 56]]
count = 0
for i in range(0, len(testScores)):
    for j in range(0, len(testScores[i])):
        if testScores[i][j] == 0:
            count = count + 1
print("There are " + str(count) + " absences")


#SECTION B
#change some values to 0
##input()
##testScores[0][0] = 0
##testScores[0][3] = 0
##testScores[1][2] = 0
##
##count = 0
##for i in range(0, len(testScores)):
##    for j in range(0, len(testScores[i])):
##        if testScores[i][j] == 0:
##            count = count + 1
##print("Now there are " + str(count) + " absences")
##for test in testScores:
##    print(test)


#SECTION C
#add another set of tests
##input()
##newScores = [45, 67, 34, 12, 0]
##testScores.append(newScores)
##count = 0
##for i in range(0, len(testScores)):
##    for j in range(0, len(testScores[i])):
##        if testScores[i][j] == 0:
##            count = count + 1
##print("Now there are " + str(count) + " absences")
##for test in testScores:
##    print(test)


#SECTION D
#add a score to one set of tests
#you can have uneven sets of scores
##input()
##testScores[1].append(0)
##count = 0
##for i in range(0, len(testScores)):
##    for j in range(0, len(testScores[i])):
##        if testScores[i][j] == 0:
##            count = count + 1
##print("Now there are " + str(count) + " absences")
##for test in testScores:
##    print(test)