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#6. 타일 교환

#6. 타일 교환

Level 3

Input

Output

Sample

Input 1

Output 1

Sample

Input 2

Output 2

Sample

Input 3

Output 3

Sample

Input 4

Output 4

Sample

Input 5

Output 5

Sample

Input 6

Output 6

Sample

Input 7

Output 7

Sample

Input 8

Output 8

Sample

Input 9

Output 9

Sample

Input 10

Output 10

Sample

Input 11

Output 11

Sample

Input 12

Output 12

Time Limit

Memory Limit

Source

1000 ms

128 MB

USACO November 2011 Silver 3번