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Math Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2518    Accepted Submission(s): 605 Problem Description Here has an fu

刁难的李老师（升级版） Time Limit: 1 Sec  Memory Limit: 64 MB Submit: 67  Solved: 10 [Submit][Status][Web Board] Description 李老师后来发现，上回给出的题目，一些机灵的同学还是找到了“投机取巧”的解决办法，于是决定要再度考验一下他们。他给同学们 修改了原来那道题，他在题中又增

Integral Function Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 78  Solved: 26 [Submit][Status][Web Board] Description In mathematics, several function are unable to integral. For e

阶乘除法 Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 13  Solved: 7 [Submit][Status][Web Board] Description 输入两个正整数 n, m，输出 n!/m!，其中阶乘定义为 n!= 1*2*3*...*n (n>=1)。 比如，若 n=6, m=3，则 n!/m!=6!/

台球碰撞 Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 47  Solved: 9 [Submit][Status][Web Board] Description 在平面直角坐标系下，台球桌是一个左下角在(0,0)，右上角在(L,W)的矩形。有一个球心在(x,y)，半径为R的圆形母球放在台球桌上（整个球都在台球桌内）。受撞击后，球

Triangle Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 64  Solved: 23 [Submit][Status][Web Board] Description 给你长度为1～n n条边，请你求出有多少种组合方法数可以选出三条边构成三角形 Input 多组数据输入输出(数据组数考虑为最大可能

分数分解(0626) Time limit(ms): 1000 Memory limit(kb): 65535 Submission: 350 Accepted: 156 Accepted 分子为1 的分数称为埃及分数，现输入一个真分数，请将该分数按下面的方法分解为埃及分数:  1.若真分数的分子a能整除分母b，

GTY's math problem Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2098    Accepted Submission(s): 773 Problem Description GTY is a

今天在做百度之星初赛的一道题瞬间移动（hdu5698）时，推出了跟杨辉三角类似的性质却没能写出组合数，于是复习了下杨辉三角性质。   1                          1   1                           1   2   1                         1   3   3   1          

Jesus Is Here Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 65535/102400 K (Java/Others) Total Submission(s): 511    Accepted Submission(s): 367 Problem Description I've sent Fan

Little Pony and Alohomora Part I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 416    Accepted Submission(s): 220 Problem Descriptio

Card Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 821    Accepted Submission(s): 337 Special Judge Problem Description There are

DZY Loves Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 856    Accepted Submission(s): 466 Problem Description There are n 

Alexandra and A*B Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 804    Accepted Submission(s): 212 Problem Description Al

long long pow_mod(int a,int n) { long long ans=1; while(n) { if(n&1) ans=ans*a%mod; a=a*a%mod; n>>=1; } return ans; } long long C(int k,int n) { long lo