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LeetCode OJ - Next Permutation
题目:Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not poss...
分类:其他好文   时间:2014-07-07 10:57:23    阅读次数:175
HDU 1058 Humble Numbers
既然将这道题分类到动态规划的题目里面,一开始便是用动态规划的思想去思考。一个上午毫无突破,看的人家的题解。定义四个伪指针存放下标,分别表示的意思是在已知的丑数中,能够与2,3,5,7相乘的最小的数的下标。上面这句话要好好体会。也就是说dp[p1] * 2 能够得到一个新的丑数,其他三个以此类推。但我...
分类:其他好文   时间:2014-07-06 20:41:32    阅读次数:223
Leetcode Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
分类:其他好文   时间:2014-07-06 16:45:00    阅读次数:201
【题解】【数组】【Prime and composite numbers】【Codility】Peaks
Divide an array into the maximum number of same((-))sized blocks, each of which should contain an index P such that A[P - 1] A[P + 1].
分类:其他好文   时间:2014-07-06 15:30:31    阅读次数:465
【题解】【数组】【Prime and composite numbers】【Codility】Flags
Find the maximum number of flags that can be set on mountain peaks.
分类:其他好文   时间:2014-07-06 15:07:09    阅读次数:371
LeetCode——Palindrome Number
Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string...
分类:其他好文   时间:2014-07-05 10:44:29    阅读次数:227
uva 11105 - Semi-prime H-numbers(数论)
题目链接:uva 11105 - Semi-prime H-numbers 题目大意:H-number为4?k+1(k为非负数),H-composites为因子中含有H-number(不包括自己本身)的数,反之久是H-prime,给定n,求有多少H-composites。 解题思路:首先用筛选法求出范围内的H-prime,然后枚举两个判断乘积是否在范围内。 #include #...
分类:其他好文   时间:2014-07-04 00:26:37    阅读次数:248
leecode 回文字符串加强版
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana...
分类:其他好文   时间:2014-07-03 19:38:58    阅读次数:287
uva 10539 - Almost Prime Numbers(数论)
题目链接:uva 10539 - Almost Prime Numbers 题目大意:给出范围low~high,问说在这个范围内有多少个数满足n=pb,(p为素数). 解题思路:首先处理出1e6以内的素数,然后对于每个范围,用solve(high)?solve(low?1),solve(n)用来处理小于n的满足要求的数的个数。枚举素数,判断即可。 #include #include...
分类:其他好文   时间:2014-07-03 16:50:09    阅读次数:190
【LeetCode】Valid Palindrome
题目 Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" i...
分类:其他好文   时间:2014-07-02 09:49:04    阅读次数:271
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