문제
See how they roll! According to a famous story, Warren Buffett once challenged Bill Gates to a simple game of dice. He had three dice; the first player could examine them and choose one of the three. The second player would then choose one of the remaining dice, and both players would roll their dice against each other, aiming for the highest numbers. Warren offered to let Bill go first, but this made Bill suspicious so he opted to go second. It turned out to be a wise choice: these were intransitive dice. The first die had an advantage when rolling against the second, the second had an advantage when rolling against the third, but the first did not have an advantage when rolling against the third!
To formalize this: define a “die” as any shape with at least one face such that each face shows a positive integer. When a die is rolled, one of its faces is selected uniformly at random. When two dice roll against each other, the die whose selected face shows a higher number earns 1 point; if both numbers are equal, each die earns
Given two dice D1 and D2 such that D1 has an advantage over D2, you want a third die D3 that forms an intransitive trio with the other two. Among all D3 that have an advantage over or tie with D1, compute the lowest possible score(D3,D2). If this is less than
입력
The input contains two lines, each describing one die. One of the dice (the first or the second) has an advantage over the other. The die with the advantage is
The first integer on a line gives n (
출력
Output one line containing the lowest
The two scores do not need to use the same die
예제 #1
6 1 1 6 6 8 8
3 2 4 9
0.291666667 0.750000000
예제 #2
4 9 3 7 5
3 4 2 3
0.500000000 0.500000000