#include<stdio.h> #include<string.h> #include<iostream> #include<math.h> #include<stdlib.h> #include<algorithm> using namespace std; #define N 500000 #define mod 1000000007 __int64 a[N], b[N], ans[N]; void Init() { int…

题目链接: Hdu 5439 Aggregated Counting 题目描述: 刚开始给一个1,序列a是由a[i]个i组成,最后1就变成了1,2,2,3,3,4,4,4,5,5,5.......,最后问a[i]出现n次(i最大)时候,i最后一次出现的下标是多少? 解题思路: 问题可以转化为求a[i] == n (i最大),数列前i项的和为多少. index: 1 2 3 4 5 6 7 8 9 10 a:        1 2 2 3 3 4 4 4 5 5 可以观察出:ans[1] = 1,…

题意:找字串中最长回文串的最小值的串 m=2的时候暴力打表找规律,打表可以用二进制枚举…

Ponds Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1288    Accepted Submission(s): 429 Problem Description Betty owns a lot of ponds, some of them are connected with other ponds by pipes, a…

n个结点,m条边,权值是 从u到v所花的时间 ,每次询问会给一个时间,权值比 询问值小的边就可以走 从u到v 和从v到u算不同的两次 输出有多少种不同的走法(大概是这个意思吧)先把边的权值 从小到大排序 询问值也按从小到大排序num记录集合里元素的个数每合并两个集合 ans增加 2*num[u]*num[v] Sample Input15 5 3 //n w q2 3 63341 5 157243 5 57054 3 123821 3 2172660001000013000 Sample Out…

题意:M=p1*p2*...pk:求C(n,m)%M,pi小于10^5,n,m,M都是小于10^18. pi为质数 M不一定是质数 所以只能用Lucas定理求k次 C(n,m)%Pi最后会得到一个同余方程组x≡B[0](mod p[0])x≡B[1](mod p[1])x≡B[2](mod p[2])......解这个同余方程组 用中国剩余定理 Sample Input19 5 23 5 Sample Output6 # include <iostream> # include <cst…

题目链接: Hdu  5445 Food Problem 题目描述: 有n种甜点,每种都有三个属性(能量,空间,数目),有m辆卡车,每种都有是三个属性(空间,花费,数目).问至少运输p能量的甜点,花费最小是多少? 解题思路: 明显可以看出是多重背包搞两次,但是数据范围太大了,背包要到2*1e6,感觉会TLe.还是呆呆的写了一发,果断超啊!然后滚回去看背包九讲课件了,看到了二进制压缩的时候,感觉可以搞这个题目.试了一下果然AC,原本物品数目是100*100,二进制压缩以后也就是100*log210…

A prime number (or a prime) is a natural number greater than 11 that cannot be formed by multiplying two smaller natural numbers. Now lets define a number NN as the supreme number if and only if each number made up of an non-empty subsequence of all…

Theme Section Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 271    Accepted Submission(s): 121 Problem Description It's time for music! A lot of popular musicians are invited to join us in the…

Stone Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 179    Accepted Submission(s): 137 Problem Description Tang and Jiang are good friends. To decide whose treat it is for dinner, they are pla…