n = int(input())

num = [0] * n

for i in range(n):
    g, d = map(int, input().split())
    num[i] = [g, d]

for i in range(n):
    g = num[i][0]
    d = num[i][1]
    if g - 30000 * d >= 500000:
        a = i + 1
        for j in range(6):
            print(a)
        break
else:
    print("NO")