Codeforces Round 816 (Div. 2)
B
Beautiful Array
Codeforces
1000
原题
← AC →
翻译中…

Stanley defines the beauty of an array $a$ of length $n$, which contains non-negative integers, as follows: $$\sum\limits_{i = 1}^{n} \left \lfloor \frac{a_{i}}{k} \right \rfloor,$$ which means that we divide each element by $k$, round it down, and sum up the resulting values.

翻译中…

Stanley told Sam the integer $k$ and asked him to find an array $a$ of $n$ non-negative integers, such that the beauty is equal to $b$ and the sum of elements is equal to $s$. Help Sam — find any of the arrays satisfying the conditions above.

翻译中…

Input

翻译中…

Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1 \le t \le 1000$). Description of the test cases follows.

翻译中…

The first line of each test case contains integers $n$, $k$, $b$, $s$ ($1 \leq n \leq 10^{5}$, $1 \leq k \leq 10^{9}$, $0 \leq b \leq 10^{9}$, $0 \leq s \leq 10^{18}$).

翻译中…

It is guaranteed that the sum of $n$ over all test cases does not exceed $10^5$.

翻译中…

Output

翻译中…

For each test case print $-1$ if such array $a$ does not exist. Otherwise print $n$ non-negative integers $a_1, a_2, \ldots, a_n$ ($0 \leq a_{i} \leq 10^{18}$) — the answer.

翻译中…

Note

翻译中…

In the first, the second, the fifth and the sixth test cases of the example it is possible to show that such array does not exist.

翻译中…

In the third testcase of the example $a = [0, 0, 19]$. The sum of elements in it is equal to 19, the beauty of it is equal to $\left ( \left \lfloor \frac{0}{6} \right \rfloor + \left \lfloor \frac{0}{6} \right \rfloor + \left \lfloor \frac{19}{6} \right \rfloor \right ) = (0 + 0 + 3) = 3$.

翻译中…

In the fourth testcase of the example $a = [0, 3, 3, 3, 29]$. The sum of elements in it is equal to $38$, the beauty of it is equal to $(0 + 0 + 0 + 0 + 7) = 7$.

翻译中…

样例

Input #1
8
1 6 3 100
3 6 3 12
3 6 3 19
5 4 7 38
5 4 7 80
99978 1000000000 100000000 1000000000000000000
1 1 0 0
4 1000000000 1000000000 1000000000000000000
Output #1
-1
-1
0 0 19
0 3 3 3 29
-1
-1
0
0 0 0 1000000000000000000
InputCopy OutputCopy
题目信息
题号
1715B
时间限制
1 s
内存限制
256 MB
标签
构造
贪心
数学

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。