龙崎的专栏

Bomb Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others) Total Submission(s): 9755    Accepted Submission(s): 3457 Problem Description The counter-terrorists f

BCD Code Time Limit: 5 Seconds Memory Limit: 65536 KBBinary-coded decimal (BCD) is an encoding for decimal numbers in which each digit is represented by its own binary sequence. To encode a decim

E. Periodical Numbers time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard outputA non-empty string s is called binary, if it consists only of

XHXJ’s LISProblem Descriptiondefine xhxj (Xin Hang senior sister(学姐)) If you do not know xhxj, then carefully reading the entire description is very important. As the strongest fighting force in UEST

Final Kichiku “Lanlanshu”Problem Description During 2010 summer training, temperlisyer often does problem like this: “Consider a decimal integer as sequence of digits {D0, D1 … Dn-1} (D0 > 0), if exi

1057. Amount of DegreesCreate a code to determine the amount of integers, lying in the set [X;Y] and being a sum of exactly K different integer degrees of B. Example. Let X=15, Y=20, K=2, B=2. By this

吉哥系列故事——恨7不成妻Problem Description 　　单身! 　　依然单身！ 　　吉哥依然单身！ 　　DS级码农吉哥依然单身！ 　　所以，他生平最恨情人节，不管是214还是77，他都讨厌！ 　　 　　吉哥观察了214和77这两个数，发现： 　　2+1+4=7 　　7+7=7*2 　　77=7*11 　　最终，他发现原来这一切归根到底都是因为和7有关！所以，他现在

B. Little Elephant and ElectionsThere have recently been elections in the zoo. Overall there were 7 main political parties: one of them is the Little Elephant Political Party, 6 other parties have less

1032 - Fast Bit Calculations PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB A bit is a binary digit, taking a logical val

题意：输入两个十进制正整数a和b，求闭区间 [a ,b] 内有多少个Round number，Round Number就是把一个十进制数转换为一个无符号二进制数，若该二进制数中0的个数大于等于1的个数，则它就是一个Round Number 思路:dp[cur][num1][num2]表示到当前位置0为num1,1为num2的答案是多少 #include #include #inc

1140 - How Many Zeroes? PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB Jimmy writes down the decimal representations of a

1205 - Palindromic Numbers PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB A palindromic number or numeral palindrome is a

1068 - Investigation PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB An integer is divisible by 3 if the sum of its digits

D. Beautiful numbers Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is divisible by each of its nonzero dig

学习资料： 初探数位dp 还有就是两篇国家集训队论文：数位技术问题解法研究，浅谈数位类统计问题   数位DP的记忆化搜索形式比一般递推形式好写多了，而且一般不容易出错。   dfs求[0,n]有多少个符合的，先把n换成字符串形式。   cur：现在处理到哪一位。   s：搜索到目前为止，之前的状态，具体什么状态看情况而定。   e：是否到达边界，如果没到这一位只取到9，否则只

Balanced Number Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 2720    Accepted Submission(s): 1242 Problem Description A balanced nu

不要62 Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 24806    Accepted Submission(s): 8524 Problem Description 杭州人称那些傻乎乎粘嗒嗒的人为62（音：laoe

B-number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3095    Accepted Submission(s): 1717 Problem Description A wqb-number, or B-nu

D. Babaei and Birthday CakeAs you know, every birthday party has a cake! This time, Babaei is going to prepare the very special birthday party’s cake.Simple cake is a cylinder of some radius and height