“I’m building a fence (围栏)!” my dad walked into the kitchen and said angrily.“What’s going on?” I asked.“That man next door,” my father explained. “His rabbits got into my garden (花园) again last night. Clearly, he doesn’t want to control them, so I’m going to ...
证明:设四边为a,b,c,d。 因为有a < b+c+d,所以2*a < a+b+c+d =周长,所以a <周长/2。 *f[i][j]:i条边,总长为j的方案数 求=f[4][n];for(inti=1;i<=4;i++)for(intj=1;j<=n;j++)intk=min(j,Len); f[i][j]=f[i-1][j-k](1<=k<min(j,n/2))=sum[i-1][j-1...
证明:设四边为a,b,c,d。因为有a < b+c+d,所以2*a < a+b+c+d = 周长,所以a < 周长/2。 *f[i][j]:i条边,总长为j的方案数 求=f[4][n]; for(int i=1;i<=4;i++) for(int j=1;j<=n;j++) int k=min(j,Len); f[i][j]=f[i-1][j-k](1<=k<min(j,n/2))=sum...
B“I'm building a fence!" my dad walked into the kitchen and said angrily."What's going on?' I asked.“That man next door," my father explained. “His rabbits got into my garden again last night. Clearly, he doesn't want to control them, so I'm going to build a fence. Will...
Building a Fence against Terror; for Israel, a Matter of Life and Death
【CF 1469 C】 Building a Fence 题意思考过程通过观察条件,可以发现每次的选择范围由前一个和当前条件的限制。所以按顺序推进计算范围即可。/***showtime***/ constint n = 2+9;int [maxn]; int [maxn],low[maxn]; intmain(){int ; scanf...
Norway may put a fence along part or all of the 123-mile border it shares with Russia, a move inspired by a similar project in its Nordic neighbor Finland.
1469C Building a Fence 题目 思路:每一次求取一个范围,然后判断之后的小方格是否满足范围。对于最后和第一个方格已经取定,需要特殊判断,细节见代码。 Code: #include<iostream>#include<string>#include<map>#include<algorithm>#include<memory.h>#include<cmath>#definepii pair<int,int>#defineFAST ios::...
A-1 Fence and Landscape, based in Tyler Texas, builds fences in Smith County and surrounding areas including Gregg, Upshur, Rusk and Nacogdoches! We offer custom fences and hardscapes for your home or business. Contact us today for a free estimate!
Codeforce 1469C. Building a Fence(思维) 题目链接 题意: 用 个宽度为 1 高度为 的木板构建一段栅栏 第 个木板下面的地面高度等于 第一个和最后一个木板必须在地面上 其他的木板 底端 可能位于地面或者不高于地面 的高度上 相邻的两个木板必须有公共边 也即有重合的部分 问有没有可能建造一个符合所有规则...