sumn = 0

t = int(input())
for i in range(t):
    n, l = [int(x) for x in input().split()]
    assert 1 <= n <= 2 * 10 ** 5
    assert n <= l <= 10 ** 9 
    d = [int(x) for x in input().split()]
    
    assert d[0] == 0
    assert d[n-1] < l
    for i in range(n - 1):
        assert d[i] < d[i+1]
    
    sumn += n

assert sumn <= 2 * 10 ** 5