message

输入描述:

The first line of input contains an integer n. (n<=50000)
For the next n lines, the i-th line contains 2 integers A[i], B[i], describing the i-th line. (-1e9<=A[i],B[i]<=1e9)
All numbers A[i] are different.
The next line contains an integer m. (m<=50000)
For the next m lines, the i-th line contains 2 integers C[i],D[i], describing the i-th pair.(-2e9<=C[i],D[i]<=2e9)
Each C[j] is different from any of the numbers A[i].
Each D[j] is different from any of the numbers B[i].

输出描述:

Print m lines. The i-th line contains a real number with at least 6 digits after the decimal point, denoting the latest time White Cloud can receive a message. Your answer must be correct within an absolute error of 1e-6.
If White Cloud can't receive any message during White Rabbit's trip,print a string "No cross".

2
0 -1
1 2
3
-1 4
2 -2
2 5

5.000000000000000
4.000000000000000
No cross