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NTUCPC Speed Run! #1
比賽已結束,感謝大家的參與!
題目連結
IOICamp 2025 PreExam 進行中!
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281 . When2meet
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TopCoder
whaleisland
User's AC Ratio
71.4% (
15/21
)
Submission's AC Ratio
38.3% (
23
/
60
)
Tags
Show solution-related tags
ytp
ytp-senior
ytp-2023
Description
題目 PDF 檔在這裡
Input Format
Output Format
Sample Input 1
copy
5 10
1 1 2
1 2 3
2 2 1 3
2 2 1 5
1 3 4
1 2 5
2 2 2 5
1 1 3
1 2 4
2 2 1 4
Sample Output 1
copy
2
-1
6
5
Sample Input 2
copy
5 10
1 1 2
1 2 3
2 3 1 2 3
2 3 1 2 4
1 3 4
1 2 5
2 3 2 3 4
1 1 3
1 2 4
2 3 1 4 5
Sample Output 2
copy
2
-1
5
6
Hints
Problem Source
YTP 2023 高中組初賽 p5
Subtasks
No.
Testdata Range
Constraints
Score
1
0~1
範例測資
0
2
0, 2~10
$k_i = 2$
3
3
0~1, 11~27
$N \leq 1000, Q \leq 5000, \sum k_i \leq 5000$
3
4
0~39
無額外限制
9
Testdata and Limits
No.
Time Limit (ms)
Memory Limit (VSS, KiB)
Output Limit (KiB)
Subtasks
0
2000
524288
65536
1
2
3
4
1
2000
524288
65536
1
3
4
2
2000
524288
65536
2
4
3
2000
524288
65536
2
4
4
2000
524288
65536
2
4
5
2000
524288
65536
2
4
6
2000
524288
65536
2
4
7
2000
524288
65536
2
4
8
2000
524288
65536
2
4
9
2000
524288
65536
2
4
10
2000
524288
65536
2
4
11
2000
524288
65536
3
4
12
2000
524288
65536
3
4
13
2000
524288
65536
3
4
14
2000
524288
65536
3
4
15
2000
524288
65536
3
4
16
2000
524288
65536
3
4
17
2000
524288
65536
3
4
18
2000
524288
65536
3
4
19
2000
524288
65536
3
4
20
2000
524288
65536
3
4
21
2000
524288
65536
3
4
22
2000
524288
65536
3
4
23
2000
524288
65536
3
4
24
2000
524288
65536
3
4
25
2000
524288
65536
3
4
26
2000
524288
65536
3
4
27
2000
524288
65536
3
4
28
2000
524288
65536
4
29
2000
524288
65536
4
30
2000
524288
65536
4
31
2000
524288
65536
4
32
2000
524288
65536
4
33
2000
524288
65536
4
34
2000
524288
65536
4
35
2000
524288
65536
4
36
2000
524288
65536
4
37
2000
524288
65536
4
38
2000
524288
65536
4
39
2000
524288
65536
4
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