W = int(input())
X = [(0, 0)]
Y = []
for _ in range(W):
    a, b, c = map(int, input().split())
    prevX, prevY = X, Y
    X, Y = [], []
    prevm = - (1<<100)
    for p, m in sorted(prevX)[::-1]:
        if m <= prevm: continue
        X.append((p, m+a))
        Y.append((p, m))
        prevm = m
    prevm = - (1<<100)
    for p, m in sorted(prevY):
        if m <= prevm: continue
        X.append((p+b, m-c))
print(max([p for p, m in X if m >= 0]))