ztr loves lucky numbers 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/I Description ztr loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For…
Problem Description ztr loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Lucky number is…
题目链接 Description Final Pan likes prime numbers very much. One day, he want to find the super prime numbers.A prime numbers $n$($n$>4) is a super prime number only if $n$-4 and $n$+4 are both prime numbers,too. Your task is really easy:Give $N$,find t…
ztr loves math 题目链接: http://acm.hust.edu.cn/vjudge/contest/123316#problem/A Description ztr loves research Math.One day,He thought about the "Lower Edition" of triangle equation set.Such as n = x^2 - y^2. He wanted to know that ,for a given numb…
ztr loves math Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 896 Accepted Submission(s): 347 Problem Description ztr loves research Math.One day,He thought about the "Lower Edition" of…
Problem Description ztr loves research Math.One day,He thought about the "Lower Edition" of triangle equation set.Such as n=x2−y2. He wanted to know that ,for a given number n,is there a positive integer solutions? Input There are T test cases.…
ztr loves substring Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 219 Accepted Submission(s): 119 Problem Description ztr love reserach substring.Today ,he has n string.Now ztr want to kon…
题目链接: C. Bear and Up-Down time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The life goes up and down, just like nice sequences. Sequence t1, t2, ..., tn is called nice if the following two…
题目链接: B. Rebus time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a rebus of form ? + ? - ? + ? = n, consisting of only question marks, separated by arithmetic operation '+' an…
MG loves apple Accepts: 20 Submissions: 693 Time Limit: 3000/1500 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others) 问题描述 MGMG是一个财富爆表的男孩子.他拥有N(1<=N<=100000)N(1<=N<=100000)个苹果,每个苹果上标有一个数字00~99,代表它的价值. 一个合法的数字是不含有前导零的,这nn个苹果恰好排成了一个…
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 178 Accepted Submission(s): 93 Problem Description ztr love reserach substring.Today ,he has n string.Now ztr want to konw,can he take out exac…
Hanoi Tower Troubles Again! Problem Description People stopped moving discs from peg to peg after they know the number of steps needed to complete the entire task. But on the other hand, they didn't not stopped thinking about similar puzzles with the…
B. DZY Loves FFT 题目连接: http://codeforces.com/contest/444/problem/B Description DZY loves Fast Fourier Transformation, and he enjoys using it. Fast Fourier Transformation is an algorithm used to calculate convolution. Specifically, if a, b and c are s…
Manacher+二维费用多重背包 二进制优化 这题是一眼标算....先计算出每个长度的回文串有几种,然后用二维费用的多重背包判断是否有解. 多重背包做的时候需要二进制优化. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namespace std; ; int N, p[maxn]; char str[maxn], b[maxn]; int cnt[…
题目链接: D. Little Artem and Dance time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little Artem is fond of dancing. Most of all dances Artem likes rueda — Cuban dance that is danced by pairs…
