3873: Problem About Equation
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.
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,...,an (0≤ai≤100), where ai is the current volume of drink in the i-th mug.
Print a single number "-1" (without the quotes), if there is no solution. Otherwise, print n float numbers c1,c2,...,cn, where ci 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 ci 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.
5 50
1 2 3 4 5
12.000000
11.000000
10.000000
9.000000
8.000000
2 2
1 100
-1