x = []
y = []
b = []
x_1 = 0
y_1 = 0
n = 0

N = input()
T = input()

for i in range(0,N):
    x.append(input())
    y.append(input())
    b.append(input())

while T > 0:
    T = T - b[n] - abs(y[n]-y_1) - abs(x[n]-x_1) 
    x_1 = x[n]
    y_1 = y[n]
    n = n + 1

print n