413 . 交換禮物

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hung

User's AC Ratio

100.0% (14/14)

Submission's AC Ratio

63.6% (14/22)

Tags

ytp ytp-senior ytp-2020

Description

題目 PDF 檔在這裡

Input Format

Output Format

Sample Input 1

3
2 3 1

Sample Output 1

1

Sample Input 2

3
3 1 1

Sample Output 2

-1

Sample Input 3

5
4 3 2 5 1

Sample Output 3

2

Hints

Problem Source

YTP 2020 高中組初賽 p5

Subtasks

No. Testdata Range Constraints Score
1 0~2 範例測資 0
2 0~31 無額外限制 15

Testdata and Limits

No. Time Limit (ms) Memory Limit (VSS, KiB) Output Limit (KiB) Subtasks
0 1000 262144 65536 1 2
1 1000 262144 65536 1 2
2 1000 262144 65536 1 2
3 1000 262144 65536 2
4 1000 262144 65536 2
5 1000 262144 65536 2
6 1000 262144 65536 2
7 1000 262144 65536 2
8 1000 262144 65536 2
9 1000 262144 65536 2
10 1000 262144 65536 2
11 1000 262144 65536 2
12 1000 262144 65536 2
13 1000 262144 65536 2
14 1000 262144 65536 2
15 1000 262144 65536 2
16 1000 262144 65536 2
17 1000 262144 65536 2
18 1000 262144 65536 2
19 1000 262144 65536 2
20 1000 262144 65536 2
21 1000 262144 65536 2
22 1000 262144 65536 2
23 1000 262144 65536 2
24 1000 262144 65536 2
25 1000 262144 65536 2
26 1000 262144 65536 2
27 1000 262144 65536 2
28 1000 262144 65536 2
29 1000 262144 65536 2
30 1000 262144 65536 2
31 1000 262144 65536 2
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