MSNSADM1 Football - CodeChef Solution

testcase = int(input())
for i in range(testcase):
    f = int(input())
    a = input()
    a = a.split(' ')
    b = input()
    b = b.split(' ')
    s = []
    for j in range(f):
        s.append(int(a[j])*20-int(b[j])*10)
    s.sort()
    if s[len(s)-1]<0:
        print(0)
    else:
        print(s[len(s)-1])