题目:在网格某一处填入一个正整数,使得网格每行,每列以及两条主对角线的和都相等 题目链接:http://codeforces.com/contest/711/problem/B 分析:题目不难,找到要填的那个数填进去,然后循环比较每行每列以及对角线的和是否相等,题目提交上去卡了几次要注意几点 注意:1.答案数据范围$1\leq x \leq 1e18$,要用 long long 2.特殊情况,$n \equiv 1$时,由于一定有要填的数,所以一定有解 3.反正就是要注意看清楚题目和数据边界情况…
B. Chris and Magic Square 题目连接: http://www.codeforces.com/contest/711/problem/B Description ZS the Coder and Chris the Baboon arrived at the entrance of Udayland. There is a n × n magic grid on the entrance which is filled with integers. Chris notice…
Chris and Magic Square 题目链接: http://codeforces.com/contest/711/problem/B Description ZS the Coder and Chris the Baboon arrived at the entrance of Udayland. There is a n × n magic grid on the entrance which is filled with integers. Chris noticed that…
ZS the Coder and Chris the Baboon arrived at the entrance of Udayland. There is a n × n magic grid on the entrance which is filled with integers. Chris noticed that exactly one of the cells in the grid is empty, and to enter Udayland, they need to fi…
time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder and Chris the Baboon arrived at the entrance of Udayland. There is a n × n magic grid on the entrance which is filled with in…
挺简单的一道题,但是做的时候没想好就开始写代码了,导致迷之WA,还是要多练习啊. #include <iostream> #include <cstdio> #include <algorithm> #include <queue> #include <set> #define LL long long int using namespace std; LL Map[][]; int main() { cin.sync_with_stdio(fa…
Xtreme8.0 - Magic Square 题目连接: https://www.hackerrank.com/contests/ieeextreme-challenges/challenges/magic-square Description Johnny designed a magic square (square of numbers with the same sum for all rows, columns and diagonals i.e. both the main di…
Little Elephant loves magic squares very much. A magic square is a 3 × 3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table are equal. The figure below shows the magic square,…
Magic Square Time Limit: 2 Seconds Memory Limit: 65536 KB In recreational mathematics, a magic square of n-degree is an arrangement of n2 numbers, distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagona…
Little Elephant loves magic squares very much. A magic square is a 3 × 3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table are equal. The figure below shows the magic squar…
题目链接:http://www.codeforces.com/problemset/problem/1/A题意:至少用多少块边长为a的方块铺满NxM的矩形区域.C++代码: #include <iostream> using namespace std; int main() { long long n, m, a; cin >> n >> m >> a; cout << ((n+a-)/a) * ((m+a-)/a); ; } C++…
题目链接:https://cn.vjudge.net/problem/CodeForces-894B Ralph has a magic field which is divided into n × m blocks. That is to say, there are n rows and m columns on the field. Ralph can put an integer in each block. However, the magic field doesn't alway…
894B - Ralph And His Magic Field 思路: 当k为1时,如果n和m奇偶性不同,那么没有答案. 可以证明,在其他情况下有答案,且答案为2^(n-1)*(m-1),因为前n-1行和m-1列确定后,最后一列和最后一行可以确定,且确定的最后一格不矛盾. 可以采用在全为1的格子中把一些1换成-1的方法来证明以上两条结论. 代码: #include<bits/stdc++.h> using namespace std; #define ll long long #define…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output And while Mishka is enjoying her trip- Chris is a little brown bear. No one knows, where and when he met Mishka, but for a long time they are to…
time limit per test 2 second memory limit per test 256 megabytes input standard inputoutput standard output You a captain of a ship. Initially you are standing in a point (x1,y1)(x1,y1) (obviously, all positions in the sea can be described by cartesi…
A. Bus to Udayland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The…
A. Little Elephant and Chess 模拟. B. Little Elephant and Magic Square 枚举左上角,计算其余两个位置的值,在\(3\times 3\)判断是否符合题意. C. Little Elephant and Bits 去掉最前面的0,可以使后面的1往前移. D. Little Elephant and Elections 对于选中的数,我们只关心其中的lucky number个数,容易想到用数位dp来求,结果用\(c_i\)表示有\(i\…
Problem Description There is a matrix of size R rows by C columns. Each element in the matrix is either '0' or '1'. A square is called magic square if it meets the following three conditions.The elements on the four borders are all '1'.Inside the squ…
A 3 x 3 magic square is a 3 x 3 grid filled with distinct numbers from 1 to 9 such that each row, column, and both diagonals all have the same sum. Given an grid of integers, how many 3 x 3 "magic square" subgrids are there? (Each subgrid is co…
A 3 x 3 magic square is a 3 x 3 grid filled with distinct numbers from 1 to 9 such that each row, column, and both diagonals all have the same sum. Given an grid of integers, how many 3 x 3 "magic square" subgrids are there? (Each subgrid is co…
