NC222154. ChinoWithBall
描述
There are 
small balls with same weight in horizontal smooth plane. And the volume of these balls can be negligible. All the balls are on the same straight line. There are three possibilities for their initial speed 
which is 
m/s, 
m/s and 
m/s.
The initial speed of means that the ball moves to the left along a straight line, the initial speed of means that the ball is still at first, and the initial speed of means that the initial speed of the ball moves to the right in a straight line.
A fully elastic collision occurs when two balls collide against each other.
Fully elastic collision formula isv_1%2B2m_2v_2%7D%7B%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3Bm_1%2Bm_2%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%7D%5C%5C%20%5C%3B%20%20%5C%5C%20%20v_2%3D%5Cfrac%7B(m_2-m_1)v_2%2B2m_1v_1%7D%7B%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3Bm_1%2Bm_2%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%20%5C%3B%7D%5Cend%7Bmatrix%7D%5Cright.)
Among them,
represent the weight of the two objects that collided. 
represent the speed before the collision.
Don't be worried, this question is not a physics question. You only need to know the exchanging speed at which two objects of exactly the same weight when they collide.
Given the positions and speeds of balls at the beginning, find their positions 
seconds later.
The initial speed of
A fully elastic collision occurs when two balls collide against each other.
Fully elastic collision formula is
Among them,
Don't be worried, this question is not a physics question. You only need to know the exchanging speed at which two objects of exactly the same weight when they collide.
Given the positions and speeds of
输入描述
There are two integers in the first input line
In nextindicating the initial position and speed of the ball.
It is guaranteed in all input data that all the balls are in different positions at the beginning
输出描述
There areinteger represents the position of the
示例1
输入:
4 10 -10 1 10 -1 -7 0 5 0
输出:
-7 5 0 0
说明:
In the first case, assuming the positive direction is the right side, the ball示例2
输入:
2 1 5 1 6 -1
输出:
5 6
说明:
In the second case,The two balls collided after