http://acm.hdu.edu.cn/showproblem.php?pid=3912 这个题我用递归深搜模拟,直接爆栈了.哭啊!为什么! 这个题最主要是能走重复格子,但是方向不一样. 我用的剪枝条件:         1.判断有没有走出迷宫,走出迷宫了直接退出.         2.由于题目要求只要判断有没有把所有格子走完,则可以用一个计数器统计走过格子的数量(重复走的不算).走完了所有格子则直接退出搜索.         3.在这个格子,当前走的方向以前走过,则重复了(判重) 别人的代…

HDU 4869 Turn the pokers 题目链接 题意:给定n个翻转扑克方式,每次方式相应能够选择当中xi张进行翻转.一共同拥有m张牌.问最后翻转之后的情况数 思路:对于每一些翻转,假设能确定终于正面向上张数的情况,那么全部的情况就是全部情况的C(m, 张数)之和.那么这个张数进行推理会发现,事实上会有一个上下界,每隔2个位置的数字就是能够的方案,由于在翻牌的时候,相应的肯定会有牌被翻转,而假设向上牌少翻一张,向下牌就要多翻一张.奇偶性是不变的,因此仅仅要每次输入张数,维护上下界,最后…

Turn the pokers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1265    Accepted Submission(s): 465 Problem Description During summer vacation,Alice stay at home for a long time, with nothing t…

托一个学弟的福,学了一下他的最简便三分写法,然后找了一道三分的题验证了下,AC了一题,写法确实方便,还是我太弱了,漫漫AC路!各路大神,以后你们有啥好的简便写法可以在博客下方留个言或私信我,谢谢了! Turn the corner Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3196    Accepted Submission(s…

Turn the pokers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1064    Accepted Submission(s): 398 Problem Description During summer vacation,Alice stay at home for a long time, with nothing to…

Problem Description Mr. West bought a new car! So he is travelling around the city. One day he comes to a vertical corner. The street he is currently in has a width x, the street he wants to turn to has a width y. The car has a length l and a width d…

Turn the pokers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 196    Accepted Submission(s): 51 Problem Description During summer vacation,Alice stay at home for a long time, with nothing to…

Turn the corner Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2229    Accepted Submission(s): 856 Problem Description Mr. West bought a new car! So he is travelling around the city. One day h…

传送门 Turn the corner Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2081    Accepted Submission(s): 787 Problem Description Mr. West bought a new car! So he is travelling around the city. One da…

Turn the pokers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 108    Accepted Submission(s): 21 Problem Description During summer vacation,Alice stay at home for a long time, with nothing to…