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4597: P1244 [NOI2000] 青蛙过河
Memory Limit:128 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
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Description
Input
Output
Sample Input
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1 1
Sample Output
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4
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Source/Category
https://www.luogu.com.cn/problem/P1244
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