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Start:
Aug, 05, 2019 09:00:00
2019暑期社会实践课后题day9
End:
Aug, 18, 2019 00:00:00
Time elapsed:
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D
老牛生小牛
1505
Time Limit:
1 s
Memory Limit:
32 MB
Submission:
4
AC:
3
Score:
0
Submit
Codes
Description
设有一对牛(一公一母),从出生第四年起每年生一对牛(一公一母),按此规律,第N年时有几对牛?
Input
输入一个整数N。(1≤N≤50)
Output
第N年时牛的对数
Samples
input
Copy
5
output
Copy
3
Submit
Codes