题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1053 Entropy Description An entropy encoder is a data encoding method that achieves lossless data compression by encoding a message with “wasted” or “extra” information removed. In other words, entropy e…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=1053 Entropy Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7233    Accepted Submission(s): 3047 Problem Description An entropy encoder is a data…

Entropy Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3648    Accepted Submission(s): 1451 Problem Description An entropy encoder is a data encoding method that achieves lossless data compress…

http://acm.hdu.edu.cn/showproblem.php?pid=1053 #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <queue> using namespace std; ]; ]; int cal(char x){ ; ; } struct node{ int w; friend bool o…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1053 讲解: 题意:给定一个字符串,根据哈夫曼编码求出最短长度,并求出比值. 思路:就是哈夫曼编码.把单个字符出现次数作为权值. AC代码: #include <iostream> #include <string> #include <queue> #include <cstdio> using namespace std; class node{ publi…

huffman coding, greedy algorithm. std::priority_queue, std::partition, when i use the three commented lines, excution time increase to 15ms from 0ms, due to worse locality? thanks to http://acm.hdu.edu.cn/discuss/problem/post/reply.php?action=support…

构造huffman编码,果断对字符进行状态压缩. #include <iostream> #include <cstdio> #include <cstring> #include <queue> using namespace std; #define MAXN 255 char s[MAXN]; ], lens[]; typedef struct node_t { int v; int n; node_t() { } node_t(int vv, int…

HDU 1000 A + B Problem  I/O HDU 1001 Sum Problem  数学 HDU 1002 A + B Problem II  高精度加法 HDU 1003 Maxsum  贪心 HDU 1004 Let the Balloon Rise  字典树,map HDU 1005 Number Sequence  求数列循环节 HDU 1007 Quoit Design  最近点对 HDU 1008 Elevator  模拟 HDU 1010 Tempter of th…

A:合并果子(贪心+优先队列) B:HDU 1789 Doing Homework again(非常经典的贪心) C:11572 - Unique Snowflakes(贪心,两指针滑动保存子段最大长度) D:POJ 1328 Radar Installation(很新颖的贪心,区间贪心) E:HDU 1053 Entropy(哈夫曼编码 贪心+优先队列) F:POJ 3122 Pie(二分+贪心) G:HDU 1735 字数统计(模拟+一点点贪心的思想) H:HDU 4864 Task(经典贪…

Safe Or Unsafe Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1388    Accepted Submission(s): 544 Problem Description Javac++ 一天在看计算机的书籍的时候,看到了一个有趣的东西!每一串字符都可以被编码成一些数字来储存信息,但是不同的编码方式得到的储存空间是不一样…