题目链接: http://codeforces.com/problemset/problem/710/C 题目大意: 构造一个N*N的幻方.任意可行解. 幻方就是每一行,每一列,两条对角线的和都相等. 题目思路: [模拟] 分为奇幻方.单偶幻方和双偶幻方三种构造. 具体分类可以查看百度.幻方的N种构造方法 // //by coolxxx //#include<bits/stdc++.h> #include<iostream> #include<algorithm> #i…

C. Magic Odd Square time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd.…

题意:给它定一个n,让你输出一个n*n的矩阵,使得整个矩阵,每行,每列,对角线和都是奇数. 析:这个题可以用n阶奇幻方来解决,当然也可以不用,如果不懂,请看:http://www.cnblogs.com/dwtfukgv/articles/5797527.html 剩下的就很简单了. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <str…

C. Magic Odd Square time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd.…

构造. 先只考虑用$0$和$1$构造矩阵. $n=1$,$\left[ 1 \right]$. $n=3$,(在$n=1$的基础上,最外一圈依次标上$0$,$1$,$0$,$1$......) $\left[ {\begin{array}{*{20}{c}}0&1&0\\1&1&1\\0&1&0\end{array}} \right]$. $n=5$,(在$n=3$的基础上,最外一圈依次标上$1$,$0$,$1$,$0$......) $\left[ {\b…

Magic Odd Square Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd. Input The only line contains odd integer n (1 ≤ n ≤ 49). Output Print n lines with n integers. All the integers…

题目链接: C. Magic Odd Square Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd. Input The only line contains odd integer n (1 ≤ n ≤ 49). Output Print n lines with n integers. All the…

Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd. Input The only line contains odd integer n (1 ≤ n ≤ 49). Output Print n lines with n integers. All the integers should be differ…

上一次我们拿学校的URP做了个小小的demo.... 其实我们还可以把每个学生的证件照爬下来做成一个证件照校花校草评比 另外也可以写一个物理实验自动选课... 但是出于多种原因,,还是绕开这些敏感话题.. 今天,我们来扒一下cf的题面! PS:本代码不是我原创 1. 必要的分析 1.1 页面的获取 一般情况CF的每一个 contest 是这样的: 对应的URL是:http://codeforces.com/contest/xxx 还有一个Complete problemset页面,它是这样的:…

http://codeforces.com/contest/738/problem/D Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of bconsecutive cells. No cell can be part of two ships, however, the shi…