Problem About Equation

2000ms

262144K

Description:

A group of n merry programmers celebrate Robert Floyd's birthday. Polucarpus has got an honourable task of pouring Ber-Cola to everybody. Pouring the same amount of Ber-Cola to everybody is really important. In other words, the drink's volume in each of the n mugs must be the same.

Polycarpus has already began the process and he partially emptied the Ber-Cola bottle. Now the first mug has a₁ milliliters of the drink, the second one has a₂ milliliters and so on. The bottle has b milliliters left and Polycarpus plans to pour them into the mugs so that the main equation was fulfilled.

Write a program that would determine what volume of the drink Polycarpus needs to add into each mug to ensure that the following two conditions were fulfilled simultaneously:

there were b milliliters poured in total. That is, the bottle need to be emptied;
after the process is over, the volumes of the drink in the mugs should be equal.

Input:

The first line contains a pair of integers n, b (2 ≤ n ≤ 100, 1 ≤ b ≤ 100), where n is the total number of friends in the group and b is the current volume of drink in the bottle. The second line contains a sequence of integers a₁, a₂, ..., a_n (0 ≤ a_i ≤ 100), where a_i is the current volume of drink in the i-th mug.

Output:

Print a single number "-1" (without the quotes), if there is no solution. Otherwise, print n float numbers c₁, c₂, ..., c_n, where c_i is the volume of the drink to add in the i-th mug. Print the numbers with no less than 6 digits after the decimal point, print each c_i on a single line. Polycarpus proved that if a solution exists then it is unique.

Russian locale is installed by default on the testing computer. Make sure that your solution use the point to separate the integer part of a real number from the decimal, not a comma.

Sample Input:

5 50
1 2 3 4 5

Sample Output:

Sample Input:

2 2
1 100

Sample Output:

-1

Informação

Provedor Codeforces

Código CF174A