CCC 2014 J3: Double Dice

This a math question.

Antonia and David are playing a game. Each player starts with 100 points.

For each round, who win with n points, another person score subtract n.

Finally, print Antonia and David score.

N = int(input())

a = 100
b = 100
for i in range(N):
    s = input().rstrip().split()
    ca = int(s[0])
    cb = int(s[1])
    if ca > cb:
        b -= ca
    elif ca < cb:
        a -= cb

print(a)
print(b)