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Challenges Win a War (or at least a few battles)

You have an army of size $n$ that you need to split up to fight $k$ battles simultaneously against an opposing army $A$. In each battle, the army with the most troops present wins - no one wins a t...

2 answers  ·  posted 4y ago by Quintec‭  ·  edited 3y ago by General Sebast1an‭

#2: Post edited by user avatar General Sebast1an‭ · 2021-08-12T19:02:34Z (over 3 years ago)
Win a War (or at least a few battles)
  • You have an army of size $n$ that you need to split up to fight $k$ battles simultaneously against an opposing army $A$. In each battle, the army with the most troops present wins - no one wins a tie. Your scouts have just reported back with the enemy troops' movements - how can you divide your army to win the most battles? What's more, if 2 different arrangements win the same number of battles, you prefer the arrangement that beats the most enemy soldiers.
  • # Input
  • The integers $n, k$ and an array $A$ that contains the number of enemy troops at each battle location.
  • # Output
  • An array corresponding to A that represents the number of your own troops you will send to that location. There are most likely be multiple solutions - you may return any possible solution that maximizes the amount of battles won while also maximizing the numbers of soldiers beaten within the maximum amount of battles won.
  • # Example
  • $n = 100, k = 5, A = [20, 20, 20, 20, 20]$
  • The enemy has split their army evenly - to win the maximum amount of battles, 4, we can simply ignore battle 1 and distribute evenly among the other 4, for example $[0, 25, 25, 25, 25]$.
  • $n = 50, k = 5, A = [40, 30, 20, 10, 0]$
  • We're outnumbered, but we can still win 3 battles. $[0, 0, 25, 15, 10]$ would win 3 battles, but remember, we want to win against larger enemy forces if possible, so a correct optimal answer could be $[0, 35, 0, 14, 1]$
  • # More Input/Output Examples
  • Only one of many possible outputs is shown.
  • ```
  • n, k, A -> Output
  • 1, 1, [0] -> [1]
  • 2, 2, [1,1] -> [2, 0]
  • 10, 3, [4, 3, 3] -> [5, 0, 5]
  • 100, 3, [50, 25, 25] -> [60, 40, 0]
  • 100, 5, [33, 34, 33, 0, 0] -> [0, 50, 40, 5, 5]
  • ```
  • This is code golf, so shortest solution in each language wins.
  • You have an army of size $n$ that you need to split up to fight $k$ battles simultaneously against an opposing army $A$. In each battle, the army with the most troops present wins - no one wins a tie. Your scouts have just reported back with the enemy troops' movements - how can you divide your army to win the most battles? What's more, if 2 different arrangements win the same number of battles, you prefer the arrangement that beats the most enemy soldiers.
  • # Input
  • The integers $n, k$ and an array $A$ that contains the number of enemy troops at each battle location.
  • # Output
  • An array corresponding to A that represents the number of your own troops you will send to that location. There are most likely be multiple solutions - you may return any possible solution that maximizes the amount of battles won while also maximizing the numbers of soldiers beaten within the maximum amount of battles won.
  • # Example
  • $n = 100, k = 5, A = [20, 20, 20, 20, 20]$
  • The enemy has split their army evenly - to win the maximum amount of battles, 4, we can simply ignore battle 1 and distribute evenly among the other 4, for example $[0, 25, 25, 25, 25]$.
  • $n = 50, k = 5, A = [40, 30, 20, 10, 0]$
  • We're outnumbered, but we can still win 3 battles. $[0, 0, 25, 15, 10]$ would win 3 battles, but remember, we want to win against larger enemy forces if possible, so a correct optimal answer could be $[0, 35, 0, 14, 1]$
  • # More Input/Output Examples
  • Only one of many possible outputs is shown.
  • ```
  • n, k, A -> Output
  • 1, 1, [0] -> [1]
  • 2, 2, [1,1] -> [2, 0]
  • 10, 3, [4, 3, 3] -> [5, 0, 5]
  • 100, 3, [50, 25, 25] -> [60, 40, 0]
  • 100, 5, [33, 34, 33, 0, 0] -> [0, 50, 40, 5, 5]
  • ```
  • This is <a class="badge is-tag">code-golf</a>, so shortest solution in each language wins.
#1: Initial revision by user avatar Quintec‭ · 2021-02-10T19:36:52Z (almost 4 years ago)
Win a War (or at least a few battles)
You have an army of size $n$ that you need to split up to fight $k$ battles simultaneously against an opposing army $A$. In each battle, the army with the most troops present wins - no one wins a tie. Your scouts have just reported back with the enemy troops' movements - how can you divide your army to win the most battles? What's more, if 2 different arrangements win the same number of battles, you prefer the arrangement that beats the most enemy soldiers.

# Input
The integers $n, k$ and an array $A$ that contains the number of enemy troops at each battle location.

# Output
An array corresponding to A that represents the number of your own troops you will send to that location. There are most likely be multiple solutions - you may return any possible solution that maximizes the amount of battles won while also maximizing the numbers of soldiers beaten within the maximum amount of battles won.

# Example
$n = 100, k = 5, A = [20, 20, 20, 20, 20]$

The enemy has split their army evenly - to win the maximum amount of battles, 4, we can simply ignore battle 1 and distribute evenly among the other 4, for example $[0, 25, 25, 25, 25]$.

$n = 50, k = 5, A = [40, 30, 20, 10, 0]$

We're outnumbered, but we can still win 3 battles. $[0, 0, 25, 15, 10]$ would win 3 battles, but remember, we want to win against larger enemy forces if possible, so a correct optimal answer could be $[0, 35, 0, 14, 1]$

# More Input/Output Examples

Only one of many possible outputs is shown.

```
n, k, A -> Output
1, 1, [0] -> [1]
2, 2, [1,1] -> [2, 0]
10, 3, [4, 3, 3] -> [5, 0, 5]
100, 3, [50, 25, 25] -> [60, 40, 0]
100, 5, [33, 34, 33, 0, 0] -> [0, 50, 40, 5, 5]
```

This is code golf, so shortest solution in each language wins.