int b = 0; int c = 0; int main(int argc, const char *argv[]) { printf("%d %d %d %d %d",b,b++,b,++b,b); printf("%d %d %d %d %d",c,++c,c,c++,c); return 0; } 结果为 2 1 1 1 0   2 2 1 0 0 这个能够理解,由于printf是从后往前进行的, 而: int main(int argc, const c…

步骤:1.把输入的数字和空格保存.(这里用到gets函数读取整行)2.定位空格.3.输入指令. #include<stdio.h> #include<string.h> ][];//声明数组 int main(){ memset(a,,sizeof(a)); ; ; ]; ]; //输入网格 gets(a[]); gets(a[]); gets(a[]); gets(a[]); gets(a[]); //定位空格 ; x<; x++) { ; y<; y++) { if…

精确覆盖问题:在一个0-1矩阵中,选定部分行,使得每一列都有且只有一个1.求解一种选法 舞蹈链(Dance Link),也就是一个循环十字链表,可以快速的删掉和恢复某行某列 结合了舞蹈链的搜索就称作DLX算法 这里贴一个用DLX算法解决16×16数独的代码 9×9的直接暴力会更好 // LA2659 Sudoku // Rujia Liu #include<cstdio> #include<cstring> #include<vector> using namespac…

Description A Sudoku grid is a 16x16 grid of cells grouped in sixteen 4x4 squares, where some cells are filled with letters from A to P (the first 16 capital letters of the English alphabet), as shown in figure 1a. The game is to fill all the empty g…

DLX算法,刚接触,是关于精确覆盖的,白书上有算法介绍. 代码模板 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <string.h> #include <vector> using namespace std; char puzzle[20][20]; const int SLOT=0; const int…

建图: 从1到16枚举所有的行.列上放的数. 代码: #include <iostream> #include <cstdio> #include <cstring> #include <cstdlib> #include <cmath> #include <algorithm> #include <string> #include <queue> #include <stack> #include…

A.Majestic 10 签到题. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<bitset> #include<cassert> #include<cctype> #include<cmath> #include<cstdlib> #include<ctime>…

题目 Source http://acm.hdu.edu.cn/showproblem.php?pid=5456 Description As an exciting puzzle game for kids and girlfriends, the Matches Puzzle Game asks the player to find the number of possible equations A−B=C with exactly n (5≤n≤500) matches (or stic…

one recursive approach to solve hdu 1016, list all permutations, solve N-Queens puzzle. reference: the video of stanford cs106b lecture 10 by Julie Zelenski https://www.youtube.com/watch?v=NdF1QDTRkck // hdu 1016, 795MS #include <cstdio> #include &l…

Katu Puzzle Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6714   Accepted: 2472 Description Katu Puzzle is presented as a directed graph G(V, E) with each edge e(a, b) labeled by a boolean operator op (one of AND, OR, XOR) and an integ…