Description Consider equations having the following form: a1x1 3+ a2x2 3+ a3x3 3+ a4x4 3+ a5x5 3=0 The coefficients are given integers from the interval [-50,50]. It is consider a solution a system (x1, x2, x3, x4, x5) that verifies the equation, xi∈…

2945: 编程:五元向量的运算 时间限制: 1 Sec  内存限制: 128 MB 提交: 151  解决: 85 题目描述 用习惯了的运算符操作新定义的类对象,这是OO方法给我们带来的便利.下面要为的五元向量(每个向量有5个元素)装备加法.数乘和输入输出的运算功能,请在begin至end部分,写上需要的代码并提交. #include <iostream> using namespace std; const int N=5;   //向量中存储的数据个数,这里确定为5元向量 class M…

3. 使用Gauss消元法求解n元一次方程组的根,举例,三元一次方程组:0.729x1+0.81x2+0.9x3=0.6867x1+x2+x3=0.83381.331x1+1.21x2+1.1x3=1 package chapter4; import java.util.Scanner; public class demo3 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.o…

Eqs Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 13955   Accepted: 6851 Description Consider equations having the following form: a1x13+ a2x23+ a3x33+ a4x43+ a5x53=0 The coefficients are given integers from the interval [-50,50]. It i…

Eqs Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 14169   Accepted: 6972 Description Consider equations having the following form:  a1x13+ a2x23+ a3x33+ a4x43+ a5x53=0  The coefficients are given integers from the interval [-50,50].  I…

题目 http://poj.org/problem?id=1840 题意 给 与数组a[5],其中-50<=a[i]<=50,0<=i<5,求有多少组不同的x[5],使得a[0] * pow(x[0], 3) + a[1] * pow(x[1], 3) + a[2] * pow(x[2], 3) + a[3] * pow(x[3], 3) + a[4] * pow(x[4], 3)==0 其中x[i]满足-50<=x[i]<=50,0<=i<5 思路 该等式…

题目链接:http://poj.org/problem?id=1840 题意:公式a1x1^3+ a2x2^3+ a3x3^3+ a4x4^3+ a5x5^3=0,现在给定a1~a5,求有多少个(x1~x5)的组合使得公式成立.并且(x1~x5)取值再[-50,50]且不能为0 思路:因为x的值范围比较小,只有100.所以可以先求出 a1x1^3+a2x2^3+a3x3^3. 然后在求 (-1)*(a4x4^3+a5x5^3)从前面的所得的Hash表进行二分查找. #include<iostre…

题目:http://poj.org/problem?id=1840 题解:http://blog.csdn.net/lyy289065406/article/details/6647387 小优姐讲的很好了 #include<cstdio> #include<string> #include<iostream> #include<cstring> #include<map> using namespace std; ]; int main() {…

一.创建一个用户 wang@wang:~/workpalce/threading$ sudo useradd -m python # -m创建家目录 wang@wang:~/workpalce/threading$ ls ~/.. python wang wang@wang:~/workpalce/threading$ cat /etc/passwd python:x::::/home/python: wang@wang:~/workpalce/threading$ cat /etc/group…

1043: Fixed Point 时间限制: 5 Sec  内存限制: 128 MB 提交: 26  解决: 5 [提交][状态][讨论版] 题目描述 In mathematics, a fixed point (sometimes shortened to fixpoint, also known as an invariant point) of a function is a point that is mapped to itself by the function. That is…