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[U]3.2.4 Feed Ratios 枚举

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Release: 2016-06-07 15:39:05
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简答的枚举题,其他的不多说了.... 切掉之后看了下题解,复习了一遍高斯消元法和克莱姆法则。发现还是数学方法好

简答的枚举题,其他的不多说了....

切掉之后看了下题解,复习了一遍高斯消元法和克莱姆法则。发现还是数学方法好啊。

虽然枚举很省coding时间,于是乎,抱着节省code时间的态度,决定开始用模板类.....

克莱姆法则有几条重要的

1.非齐次线性方程,系数矩阵D=0时,有无穷多解。D≠0时,有唯一解。

2.齐次线性方程.系数矩阵D=0时,有解。否则无解。

另外克莱姆法则的时间效率低,因为行列式的运算=.=

使用高斯消元法,将行列式变成上下三角行列式,接着化系数,变成对角矩阵。就可以看出解了。方便解小数解。

Code可以无视:

/*
ID:sevenst4
LANG:C++
PROG:ratios
*/
#include<stdio.h>
using namespace std;

int main()
{
 	freopen( "ratios.in","r",stdin );
 	freopen( "ratios.out","w",stdout );
 	int x[4],y[4],z[4];
 	for( int i=0;i<br>
<br>

<p><br>
</p>


</stdio.h>
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