L = [[int(n) for n in l.strip().split(" ")] for l in open("input").readlines()] def predict(s): f = [] while s: f.append(s[-1]) s = [s[i] - s[i - 1] for i in range(1, len(s))] return sum(f) print(sum(predict(l) for l in L)) print(sum(predict(l[::-1]) for l in L))