2259 . I. 鐵路鋪設

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Caido
$\mathbb{W}\mathcal{aimai}\sim$

User's AC Ratio

94.8% (55/58)

Submission's AC Ratio

48.7% (76/156)

Tags

全國賽 2021-全國賽 nhspc110

Description

題目 PDF 檔在這裡

Input Format

Output Format

Sample Input 1

3

Sample Output 1

3

Sample Input 2

10

Sample Output 2

686

Sample Input 3

327

Sample Output 3

265488547

Hints

Problem Source

110 學年度全國資訊學科能力競賽
測資來源：TWPCA GitHub

Subtasks

No. Testdata Range Constraints Score
1 0~2 範例測資。 0
2 3~9 $L \le 7$ 10
3 10~42 $L \le 10 ^ 3$ 20
4 43~143 $L \le 10 ^ 5$ 34
5 144~244 無額外限制。 36

Testdata and Limits

No. Time Limit (ms) Memory Limit (VSS, KiB) Output Limit (KiB) Subtasks
0 100 1048576 65536 1
1 100 1048576 65536 1
2 100 1048576 65536 1
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