Problem where Commas Separate Digits

AtCoder

IDasaporo_f

Time3000ms

Memory256MB

Difficulty—

You are given a string $S$ consisting of digits between `1` and `9`, inclusive. You will insert at most $K$ commas (`,`) into this string to separate it into multiple numbers. Your task is to minimize the maximum number among those produced by inserting commas. Find minimum possible such value. ## Constraints * $0 ≦ K < |S| ≦ 100,000$ * $S$ consists of digits between `1` and `9`, inclusive. ## Input The input is given from Standard Input in the following format: $K$ $S$ ## Partial Scores * In the test set worth $100$ points, $|S| ≦ 2$. * In the test set worth another $100$ points, $|S| ≦ 16$. * In the test set worth another $200$ points, $|S| ≦ 100$. * In the test set worth another $200$ points, $|S| ≦ 2,000$. [samples]

Samples

Input #1

2
15267315

Output #1

315

When the string is separated into $152$, $67$ and $315$, the maximum among these is $315$, which is the minimum possible value.

Input #2

0
12456174517653111

Output #2

12456174517653111

$12456174517653111$ itself is the answer.

Input #3

8
127356176351764127645176543176531763517635176531278461856198765816581726586715987216581

Output #3

5317635176

API Response (JSON)

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    "platform": "AtCoder",
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      "content": "You are given a string $S$ consisting of digits between `1` and `9`, inclusive. You will insert at most $K$ commas (`,`) into this string to separate it into multiple numbers.\nYour task is to minimize...",
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