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NTUCPC Challenge! #1 題解公開!
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IOIC 2025 題目已公開!
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npsc
npsc-senior
npsc-2017
Description
題目 PDF 檔在這裡
Input Format
Output Format
Sample Input 1
copy
3 3 1 2 2 3 1 3
Sample Output 1
copy
0
Sample Input 2
copy
4 4 1 2 2 3 3 4 1 4
Sample Output 2
copy
4
Hints
Problem Source
NPSC 2017 高中組決賽 pD
Subtasks
No.
Testdata Range
Constraints
Score
1
0~1
範例測資
0
2
0~83
無額外限制
100
Testdata and Limits
No.
Time Limit (ms)
Memory Limit (VSS, KiB)
Output Limit (KiB)
Subtasks
0
1000
1048576
1048576
1
2
1
1000
1048576
1048576
1
2
2
1000
1048576
1048576
2
3
1000
1048576
1048576
2
4
1000
1048576
1048576
2
5
1000
1048576
1048576
2
6
1000
1048576
1048576
2
7
1000
1048576
1048576
2
8
1000
1048576
1048576
2
9
1000
1048576
1048576
2
10
1000
1048576
1048576
2
11
1000
1048576
1048576
2
12
1000
1048576
1048576
2
13
1000
1048576
1048576
2
14
1000
1048576
1048576
2
15
1000
1048576
1048576
2
16
1000
1048576
1048576
2
17
1000
1048576
1048576
2
18
1000
1048576
1048576
2
19
1000
1048576
1048576
2
20
1000
1048576
1048576
2
21
1000
1048576
1048576
2
22
1000
1048576
1048576
2
23
1000
1048576
1048576
2
24
1000
1048576
1048576
2
25
1000
1048576
1048576
2
26
1000
1048576
1048576
2
27
1000
1048576
1048576
2
28
1000
1048576
1048576
2
29
1000
1048576
1048576
2
30
1000
1048576
1048576
2
31
1000
1048576
1048576
2
32
1000
1048576
1048576
2
33
1000
1048576
1048576
2
34
1000
1048576
1048576
2
35
1000
1048576
1048576
2
36
1000
1048576
1048576
2
37
1000
1048576
1048576
2
38
1000
1048576
1048576
2
39
1000
1048576
1048576
2
40
1000
1048576
1048576
2
41
1000
1048576
1048576
2
42
1000
1048576
1048576
2
43
1000
1048576
1048576
2
44
1000
1048576
1048576
2
45
1000
1048576
1048576
2
46
1000
1048576
1048576
2
47
1000
1048576
1048576
2
48
1000
1048576
1048576
2
49
1000
1048576
1048576
2
50
1000
1048576
1048576
2
51
1000
1048576
1048576
2
52
1000
1048576
1048576
2
53
1000
1048576
1048576
2
54
1000
1048576
1048576
2
55
1000
1048576
1048576
2
56
1000
1048576
1048576
2
57
1000
1048576
1048576
2
58
1000
1048576
1048576
2
59
1000
1048576
1048576
2
60
1000
1048576
1048576
2
61
1000
1048576
1048576
2
62
1000
1048576
1048576
2
63
1000
1048576
1048576
2
64
1000
1048576
1048576
2
65
1000
1048576
1048576
2
66
1000
1048576
1048576
2
67
1000
1048576
1048576
2
68
1000
1048576
1048576
2
69
1000
1048576
1048576
2
70
1000
1048576
1048576
2
71
1000
1048576
1048576
2
72
1000
1048576
1048576
2
73
1000
1048576
1048576
2
74
1000
1048576
1048576
2
75
1000
1048576
1048576
2
76
1000
1048576
1048576
2
77
1000
1048576
1048576
2
78
1000
1048576
1048576
2
79
1000
1048576
1048576
2
80
1000
1048576
1048576
2
81
1000
1048576
1048576
2
82
1000
1048576
1048576
2
83
1000
1048576
1048576
2
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