1005 - Rooks   PDF (English) Statistics Forum Time Limit: 1 second(s) Memory Limit: 32 MB A rook is a piece used in the game of chess which is played on a board of square grids. A rook can only move vertically or horizontally from its current positio…

题目链接:http://www.lightoj.com/volume_showproblem.php?problem=1005 纸上画一下,找了一下规律,Ank*Cnk. //#pragma comment(linker, "/STACK:102400000, 102400000") #include <algorithm> #include <iostream> #include <cstdlib> #include <cstring>…

题目是在n*n的棋盘上放k个车使其不互相攻击的方案数. 首先可以明确的是n*n最多只能合法地放n个车,即每一行都指派一个列去放车. dp[i][j]表示棋盘前i行总共放了j个车的方案数 dp[0][0]=1 转移就是从第i-1行转移到第i行,对于第i行要嘛放上一个车要嘛不放,放的话有n-j-1种方法.即dp[i][j]=dp[i-1][j]+dp[i-1][j-1]*(n-j-1). #include<cstdio> #include<cstring> using namespac…

A rook is a piece used in the game of chess which is played on a board of square grids. A rook can only move vertically or horizontally from its current position and two rooks attack each other if one is on the path of the other. In the following fig…

Happy 2004 题意:s为2004^x的因子和,求s%29.     (题于文末) 知识点: 素因子分解:n = p1 ^ e1 * p2 ^ e2 *..........*pn ^ en 因子和:    Sum=(p1^0+p1^1-.p1^e1)*(p2^0+p2^1-p2^e2)--(pn^0+-pn^en) =; 积性函数:s(xy)=s(x)*s(y)    (比如:幂函数,因子和,欧拉函数,莫比乌斯函数) 对于正整数n的一个算术函数 f(n),若f(1)=1,且当a,b互质时f…

传送门 Description Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad. Let's consider the following algorithm of generating a…

//POJ3377 //DP解法-解有规律的最短路问题 //Time:1157Ms Memory:12440K #include<iostream> #include<cstring> #include<cstdio> using namespace std; #define MAXN 1000005 typedef long long LL; int n; int dp[MAXN][3]; int sr, st, er, ed; int main() { //freo…

A Simple Nim Problem Description   Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick any number of candies which come from the same heap(picking no candy is not allowed)…

UVA - 11134 Fabled Rooks We would like to place n rooks, 1 ≤ n ≤ 5000, on a n × n board subject to the following restrictions The i-th rook can only be placed within the rectan- gle given by its left-upper corner (xli,yli) and its right- lower corner…

--利用sqlserver来运算斐波那契规律 --利用事物与存储过程 declare @number intdeclare @A intdeclare @B intdeclare @C int set @A=1 set @B=2 set @Number=3 select @C=@A+@B while(@Number<60) begin    set @C=@A+@B  if(@@ERROR<>0)  goto errorhandler  print N'第'+convert(varcha…