题意: 给一个n(n<=10)个节点的无向图,图里面有m条边,以这m条边构建生成树,求所有生成树中只含有k个度数为1的点的方案数。 题解: 看见这个数量级就一定会想到状态压缩dp... 那让我们设计一下状态: dp[i][j] 表示生成树的状态为i时,所含的度数为1的点的状态j的方案数。 那么就可以 ...
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其他好文 时间:
2019-10-06 20:14:40
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75
A competitive runner would like to create a route that starts and ends at his house, with the condition that the route goes entirely uphill at first, ...
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其他好文 时间:
2019-09-19 12:28:16
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81
Canvas Quadratic Curve Example This demonstration shows how quadratic curves can be drawn on a canvas element. Drag the line ends or the control point ...
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其他好文 时间:
2019-09-09 22:32:37
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89
RobotsGiven a directed graph with no loops which starts at node 11 and ends at node nn.There is a robot who starts at 11, and will go to one of adjace ...
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其他好文 时间:
2019-09-09 13:02:02
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90
Easy There is a robot starting at position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this robot ends up at (0, 0) aft ...
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其他好文 时间:
2019-08-27 23:26:05
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127
Description here is a robot starting at position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this robot ends up at (0, ...
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其他好文 时间:
2019-08-05 19:06:21
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95
1 1 1 1 def Pjz(): c = 0 sum = 0 while 1: print('Enter an integer, the input ends if it is 0: ',end="") shu = input() if shu != '0' : sum = sum + floa ...
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编程语言 时间:
2019-08-02 16:55:09
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115
// tt.cpp : This file contains the 'main' function. Program execution begins and ends there. // #include "pch.h" #include #include typedef LONG NTSTAT... ...
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其他好文 时间:
2019-06-28 15:07:00
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138
4.1 一个源程序从写出到执行的过程 汇编语言源程序包含两种指令: 1.汇编指令 2.伪指令 汇编指令会被编译为机器指令,被CPU执行 伪指令不会,会被编译器执行 segment和ends的作用是定义一个段 end伪指令标记整个程序的结束 assume将有特定用途的段和相关的段寄存器关联起来 程序最 ...
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其他好文 时间:
2019-06-20 22:38:18
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164
Given a list of Connections, which is the Connection class (the city name at both ends of the edge and a cost between them), find edges that can conne ...
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其他好文 时间:
2019-05-29 15:02:31
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127