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Problem
Contest
Category
Submissions
English
Problem
Contest
Category
Submissions
English
#215
Submit Code
Submissions
막대 삼각형
Time Limit: 1 Sec
Memory Limit: 256 MiB
한국어
Example Input 1
Copy
6 8
Example Output 1
Copy
10
Example Input 2
Copy
4 4
Example Output 2
Copy
-1
Language-Specific Restrictions
