CF-559C Gerald and Giant Chess(计数DP) 给定一个 H∗WH∗W的棋盘,棋盘上只有NN 个格子是黑色的,其他格子都是白色的。 在棋盘左上角有一个卒,每一步可以向右或者向下移动一格,并且不能移动到黑色格子中。求这个卒从左上角移动到右下角,一共有多少种可能的路线 1≤H,W≤105,1≤N≤20001≤H,W≤10...
在棋盘左上角有一个卒,每一步可以向右或者向下移动一格,并且不能移动到黑色格子中。求这个卒从左上角移动到右下角,一共有多少种可能的路线。 输入格式 第1行:3个正整数h,w,n(1≤h,w≤10^5,1≤n≤2000) 接下来n行,第i+1行包含两个整数ri,ci即黑色格子的坐标 输出格式 输出一个整数,即总的方案数。
codeforces 559C Gerald and Giant Chess(dp+组合数学),题目链接:codeforces559C题目大意:给出一个h*r的矩阵,从左上角走到右下角,中间有一些到达第i个黑块的方案数。dp[i]=Cxixi+yj−∑xj<=
每次可以向右或向下移动 求从$(1, 1)$到$(h, w)$不经过障碍点的方案数 Sol 容斥原理 从$(1, 1)$到$(h, w)$不经过障碍点的方案数为$C(h + w, h)$ 设$f[i]$表示到达第$i$个黑格子的合法路径的方案数 首先对所有点按$x$排序,这样就能保证每次从他的左上方转移而来 然后根据公式算一下就...
[CF559C] Gerald and Giant ChessDescription 给定一个 (H imes W) 的棋盘,有 (N) 个障碍格子,棋子每次可以向右或者向下移动一步,求从左上角到右下角有多少种不同的路线。(N le 2000) Solution 由于(N) 较小,考虑 dp,设 (f[i]) 表示走到第 (i) 个障碍点(且之前不经过其它任何障碍点)的方案数,...
Giant chess is quite common in Geraldion. We。题目来自【牛客题霸】
A giant outdoor chess made from life jackets left by refugees and migrants after crossing the Aegean Sea from Turkey to Greece has been inaugurated recently at the University of the Aegean on the Greek island of Lesvos as a symbol of the ongoing tragedy.
There is growing dismay at those critiquing Assad’s overthrow for showing little regard for the sincere desire for freedom of Arabs and relegating their national aspirations to mere chess moves on a geopolitical board. Ironically, these oracles of doom are nearly always railing against the paternal...
After the death of his brother, Piper, Scoot has been more naughty than ever! He always escapes the wooden pen shown in the background of the photo. I use carabiners to clip the segments of the pen together, so he can't push them open, but the opening be
Other Characters: Constable Ryan; Constable Culloden; Anernerk; Anenerk's Grandfather; Lieutenant-Colonel Gerald Reed; Reavers; Netsilik Tribespeople; Aztecs; Spanish Captain Locations: Canada; Dawson Story: After viewing the aftermath of a massacre in a Nunamiut village in the Canadian Arctic, ...