查看题目 登录后递交 讨论 题解 文件 统计 ID 4145 时间 2000ms 内存 256MiB 难度 (无) 标签 bitmasks dp *2200 递交数 0 已通过 0 上传者 root
Harry came to know from Dumbledore that Salazar Slytherin's locket is a horcrux. This locket was present earlier at 12 Grimmauld Place, the home of Sirius Black's mother. It was stolen from there and is now present in the Ministry of Magic in the office of Dolorous Umbridge, Harry's fo...
[CF 855E] Salazar Slytherin‘s Locket 题目 洛谷 题解 算 [l,r][l,r][l,r] 中的数转化为 bbb 进制后,数位上的 0−b−10-b-10−b−1 都为偶数次的个数。 题解 首先看出来是数位dp\tt dpdp,而且还是道板???那怎么是黑的?? Code......
Time limit2000 msMemory limit262144 kBHarry came to know from Dumbledore that Salazar Slytherin's locket is a horcrux. This locket was...
如果行号影响了复制,请点击代码框左上角的按钮。 Salazar Slytherin's Locket CodeForces - 855E http://www.cnblogs.com/ftae/p/7590187.html 数位dp: http://www.cnblogs.com/xz816111/p/4809913.html http://blog.csdn.net/wust_zzwh/article/details/52100392 ...
2 seconds memory limit per test 256 megabytes input standard input output standard output Harry came to know from Dumbledore that Salazar Slytherin's locket is a horcrux. This locket was present earlier at 12 Grimmauld Place, the home of Sirius Black's mother. It was stolen from there and is...
E. Salazar Slytherin's Locket time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Harry came to know from Dumbledore that Salazar Slytherin's locket is a horcrux. This locket was present earlier at 12 Grimmauld Place, the home of Sirius...
Salazar Slytherin's Locket 题解: 数位DP。 对于不同的进制直接数位DP就好了。 在数位dp中比较基础。 通过状压来xor值,使得表示每个数字出现奇数次/偶数次. 注意的就是 去除 00 0000 这些数的影响。 代码: #include<bits/stdc
855E - Salazar Slytherin's Locket 题意 给出一个区间,问这个区间内有多少个数满足,将这个数转化为某个进制后,所有数的数量都为偶数。 分析 谁能想到 数位DP 的裸题竟然放到了 E , 美滋滋。 考虑用一个二进制数记录每种数出现的次数的奇偶性,很容易用异或去操作。
Harry came to know from Dumbledore that Salazar Slytherin's locket is a horcrux. This locket was present earlier at 12 Grimmauld Place, the home of Sirius Black's mother. It was stolen from there and is now present in the Ministry of Magic in the office of Dolorous Umbridge, Harry's fo...