302113: CF402A. Nuts
Memory Limit:256 MB
Time Limit:1 S
Judge Style:Text Compare
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Solved:0
Description
Nuts
题意翻译
你有任意多个箱子和 $a$ 个坚果,$b$ 个隔板,$x$ 个隔板可以将箱子分成 $x+1$ 个区间,每个盒子不能被分成超过 $k$ 个区间,每个区间最多只能放 $v$ 个坚果。 给定 $k,a,b,v$,问装下所有坚果需要多少个箱子。题目描述
You have $ a $ nuts and lots of boxes. The boxes have a wonderful feature: if you put $ x $ $ (x>=0) $ divisors (the spacial bars that can divide a box) to it, you get a box, divided into $ x+1 $ sections. You are minimalist. Therefore, on the one hand, you are against dividing some box into more than $ k $ sections. On the other hand, you are against putting more than $ v $ nuts into some section of the box. What is the minimum number of boxes you have to use if you want to put all the nuts in boxes, and you have $ b $ divisors? Please note that you need to minimize the number of used boxes, not sections. You do not have to minimize the number of used divisors.输入输出格式
输入格式
The first line contains four space-separated integers $ k $ , $ a $ , $ b $ , $ v $ ( $ 2<=k<=1000 $ ; $ 1<=a,b,v<=1000 $ ) — the maximum number of sections in the box, the number of nuts, the number of divisors and the capacity of each section of the box.
输出格式
Print a single integer — the answer to the problem.
输入输出样例
输入样例 #1
3 10 3 3
输出样例 #1
2
输入样例 #2
3 10 1 3
输出样例 #2
3
输入样例 #3
100 100 1 1000
输出样例 #3
1