本题题意为求 t (t<150) 个 c (n,m)  (1<=m<=n<=100000)的最大公因子: 本题的难点为优化.主要有两个优化重点.一是每次对单个素因子进行处理,优化每次的数组清零:二是对求阶乘素因子个数的优化 ei=[N/pi^1]+ [N/pi^2]+ …… + [N/pi^n]  其中[]为取整 ei 为数 N!中pi 因子的个数: #include <iostream> #include <cstring> #include <cm…

An Easy Problem?! Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7837   Accepted: 1145 Description It's raining outside. Farmer Johnson's bull Ben wants some rain to water his flowers. Ben nails two wooden boards on the wall of his barn…

An easy problem Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5475 Description One day, a useless calculator was being built by Kuros. Let's assume that number X is showed on the screen of calculator. At first,…

An Easy Problem   Description As we known, data stored in the computers is in binary form. The problem we discuss now is about the positive integers and its binary form. Given a positive integer I, you task is to find out an integer J, which is the m…

Another Easy Problem Time Limit: 1000MS   Memory Limit: 32768KB   64bit IO Format: %I64d & %I64u [Submit]   [Go Back]   [Status] Description xtt最近学习了高斯消元法解方程组,现在他的问题来了,如果是以下的方程,那么应该如何解呢? C(n1,m1)==0 (mod M) C(n2,m2)==0 (mod M) C(n3,m3)==0 (mod M) ...…

1815: easy problem Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 243  Solved: 108 SubmitStatusWeb Board Description 给你一个数字N,N的范围是1~1000000,求一个最小的正整数M,这个数字M的各个位的数字加上它本身之和恰好为N.当然,如果没有解,输出0. Input 输入数据由多组数据组成,每行由一个数字N组成(1<=N<=1000000). Output 对于每组数据,…

题目意思: http://acm.hdu.edu.cn/showproblem.php? pid=2601 给出一个数N,求N=i*j+i+j一共同拥有多少种方案. 题目分析: 此题直接暴力模拟就可以.仅仅是须要将上式转化为n+1=(i+1)*(j+1)进行计算就可以. AC代码: /** *hdu2601 An easy problem *意思:求n=i*j+i+j的种类 *分析:转化为n+1=(i+1)*(j+1),求解即可了 */ #include<iostream> #include&…

An easy problem A Time Limit: 2000/1000MS (Java/Others)     Memory Limit: 65535/65535KB (Java/Others) Submit Status N个数排成一列,Q个询问,每次询问一段区间内的数的极差是多少. Input 第一行两个整数N(1≤N≤50000),Q(1≤Q≤200000).接下来一行N个整数a1 a2 a3 ....an,(1≤ai≤1000000000).接下来Q行,每行两个整数L,R(1≤L…

http://poj.org/problem?id=2826 An Easy Problem?! Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10505   Accepted: 1584 Description It's raining outside. Farmer Johnson's bull Ben wants some rain to water his flowers. Ben nails two woode…

An Easy Problem?! Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12970   Accepted: 1995 Description It's raining outside. Farmer Johnson's bull Ben wants some rain to water his flowers. Ben nails two wooden boards on the wall of his bar…