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小明系列故事——女友的考验 Time Limit: 500/200 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2024 Accepted Submission(s): 556 Prob 阅读全文
posted @ 2018-05-03 17:21
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https://vjudge.net/problem/UVA-11762 给出一个整数n,每次随机挑选一个小于等于n的素数,如果是n的因子,n变为n/x ,否则不变,问n变为1的期望挑选次数。 f[i]=1/(m1+m2)*(SUM{ f[i] } + SUM{ f[i/x] }) +1,化简后记忆 阅读全文
posted @ 2018-05-03 12:48
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LOOPS Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 125536/65536 K (Java/Others)Total Submission(s): 7826 Accepted Submission(s): 3156 Problem 阅读全文
posted @ 2018-05-03 11:51
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Aeroplane chess Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5382 Accepted Submission(s): 3379 阅读全文
posted @ 2018-05-03 10:07
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There is a very simple and interesting one-person game. You have 3 dice, namely Die1, Die2 and Die3. Die1 has K1 faces. Die2 has K2 faces. Die3 has K3 阅读全文
posted @ 2018-05-03 09:48
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