//本来是想练一下欧拉回路的,结果紫书上那题是大水题!!!!! 题意:给出n个单词,是否可以把单词排列成每个单词的第一个字母和上一个单词的最后一个字母相同 解:欧拉通路存在=底图联通+初度!=入度的点至多只有两个(分别为入点和出点) #include<cstdio> #include<iostream> #include<cmath> #include<algorithm> #include<cstring> #include<cstdli…

Play on Words Some of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because there is no other way to open the doors, the puzzle is very important for us. There is a large numbe…

题目链接:http://poj.org/problem?id=1564 题目大意:给定一个整数t,和n个元素组成的集合.求能否用该集合中的元素和表示该整数,如果可以输出所有可行解.1<=n<=12 Sample Input 4 6 4 3 2 2 1 1 5 3 2 1 1 400 12 50 50 50 50 50 50 25 25 25 25 25 25 0 0 Sample Output Sums of 4: 4 3+1 2+2 2+1+1 Sums of 5: NONE Sums of…

水题,感觉和田忌赛马差不多 #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namespace std; struct P1 { int Num; int Hua; } Play1[]; struct P2 { int Num; int Hua; } Play2[]; bool cmp1(const P1&a,const P1&b) {…

POJ 2289 Jamie's Contact Groups / UVA 1345 Jamie's Contact Groups / ZOJ 2399 Jamie's Contact Groups / HDU 1699 Jamie's Contact Groups / SCU 1996 Jamie's Contact Groups (二分,二分图匹配) Description Jamie is a very popular girl and has quite a lot of friends…

K-th Number Time Limit: 20000MS   Memory Limit: 65536K Total Submissions: 50247   Accepted: 17101 Case Time Limit: 2000MS Description You are working for Macrohard company in data structures department. After failing your previous task about key inse…

Play on Words Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 11838   Accepted: 4048 Description Some of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because ther…

POJ 2296 Map Labeler / ZOJ 2493 Map Labeler / HIT 2369 Map Labeler / UVAlive 2973 Map Labeler(2-sat 二分) Description Map generation is a difficult task in cartography. A vital part of such task is automatic labeling of the cities in a map; where for e…

poj 1251  && hdu 1301 Sample Input 9 //n 结点数A 2 B 12 I 25B 3 C 10 H 40 I 8C 2 D 18 G 55D 1 E 44E 2 F 60 G 38F 0G 1 H 35H 1 I 353A 2 B 10 C 40B 1 C 200Sample Output 21630 prim算法 # include <iostream> # include <cstdio> # include <cstr…

POJ 1860 Currency Exchange / ZOJ 1544 Currency Exchange (最短路径相关,spfa求环) Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations onl…