2250 . E. 間諜

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

User's AC Ratio

35.2% (19/54)

Submission's AC Ratio

12.8% (31/242)

Tags

TOI TOI-pre 2022-TOI-pre

Description

題目 PDF 檔在這裡

Input Format

Output Format

Sample Input 1

3 3

Sample Output 1

-1

Sample Input 2

4 3

Sample Output 2

4 2
2 1
3 3
1 2
3 1
4 3
2 2
4 1
1 3
3 2
1 1
2 3
4 2

Hints

Problem Source

2022 TOI 初選
測資來源：TWPCA GitHub

Subtasks

No. Testdata Range Constraints Score
1 0~1 範例測資。 0
2 2~20 $nm \le 16$ 7
3 21~99 $n = 2$ 或 $m = 2$ 35
4 100~186 $n \ge 12$ 且 $m \ge 12$ 47
5 187~222 無額外限制。 11

Testdata and Limits

No. Time Limit (ms) Memory Limit (VSS, KiB) Output Limit (KiB) Subtasks
0 500 1048576 65536 1
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