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Tree Cutting After Farmer John realized that Bessie had installed a "tree-shaped" network among his N (1 <= N <= 10,000) barns at an incredible cost, 阅读全文
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Meeting Time Limit: 12000/6000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 6865 Accepted Submission(s): 2085 Prob 阅读全文
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D. Make The Fence Great Again time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You have a 阅读全文
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Infinite Fraction Path Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 5756 Accepted Submission 阅读全文
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Coding Contest Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 5968 Accepted Submission(s): 1413 阅读全文
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这题.....队里都没怎么训练差分,导致败北...写了一堆线段树嘤嘤嘤,到最后也是超时,比赛结束后看到了差分的思想于是就去学了一手. 其实了解差分思想的一眼就能看出来是差分了.但是如果对n差分的话很明显会T呢,所以我们考虑从m组询问入手. 要不我先讲一下我目前了解的差分吧. 直白说的话,差分就是用一 阅读全文
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放苹果 Description 把M个同样的苹果放在N个同样的盘子里,允许有的盘子空着不放,问共有多少种不同的分法?(用K表示)5,1,1和1,5,1 是同一种分法。 Input 第一行是测试数据的数目t(0 <= t <= 20)。以下每行均包含二个整数M和N,以空格分开。1<=M,N<=10。 阅读全文
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Caocao's Bridges Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10933 Accepted Submission(s): 30 阅读全文
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本题大意:求一个无向图额割点的个数. 本题思路:建图之后打一遍模板. 阅读全文