Dividing Numbers Time Limit: 9000/3000MS (Java/Others)     Memory Limit: 262144/262144KB (Java/Others) Submit Status Given an integer N (1≤N≤1013) and K (1≤K≤100) co-prime numbers P1,P2,...,Pk, which are less than 1000. Please tell me how many intege…

//真tm是乱搞 但是(乱搞的)思想很重要 解:大概就是记忆化搜索,但是原数据范围太大,不可能记下所有的情况的答案,于是我们就在记下小范围内的答案,当dfs落入这个记忆范围后,就不进一步搜索,直接返回记下来的答案,这样就起到了优化的效果,但是并不知道这种复杂度是怎么算的.然而我们由大到小排序,使得状态总可以很快地落入记忆化的范围. dfs(n,now)代表[1..n]内不会被a[now]...a[k-1]整除的数有多少,那么答案就是dfs(n,0). 转移关系如下:dfs(n,now)=dfs(…

有些问题,不做实践与猜测,可能一辈子也想不出答案,例如这题. #include<stdio.h> #include<math.h> long long x; int main() { while(~scanf("%lld",&x)){ ) printf("-1\n"); else printf("7\n"); } ; }…

1156. Two Rounds Time limit: 2.0 secondMemory limit: 64 MB There are two rounds in the Urals Championship. The competitors have to solve N problems on each round. The jury had been working hard and finally managed to prepare 2N problems for the champ…

在Java位运算总结-leetcode题目博文中总结了Java提供的按位运算操作符,今天又碰到LeetCode中一道按位操作的题目 Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. 题意:…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 20050   Accepted: 10989 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

You are given two linked lists representing two non-negative numbers. The most significant digit comes first and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two numbers do not con…

Given a non-empty array of numbers, a0, a1, a2, … , an-1, where 0 ≤ ai < 231. Find the maximum result of ai XOR aj, where 0 ≤ i, j < n. Could you do this in O(n) runtime? Example: Input: [3, 10, 5, 25, 2, 8] Output: 28 Explanation: The maximum resul…

Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the total numbers in the range of 0 ≤ x < 100, excluding [11,22,33,44,55,66,77,88,99]) Hint: A direct…

Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. Credits:Special thanks to @amrsaqr for adding this problem and creatin…