Unango的博客

题意： 先给结论，fmod+1=ϵ(f(1))∗f，fmod=ϵ(f(1))f^{mod+1}=ϵ(f(1))*f，f^{mod}=ϵ(f(1))fmod+1=ϵ(f(1))∗f，fmod=ϵ(f(1))，因为题目保证f(1)=1,以下直接以1替代。即自卷mod+1次就回到了起点。这个结论意味着fk∗inv(k)=ff^{k*inv(k)}=ffk∗inv(k)=f，因为根据结论可知，fp∗mo...

题面 Problem Description n soldiers are dispatched to somewhere in Byteland. These soldiers are going to set off now, but the target location is not so clear. Assume the target location is at (xe,ye), i...

Problem Description Let us define a sequence as below     Your job is simple, for each task, you should output Fn module 109+7.   Input The first line has only one integer T, indicates the num...

Taotao Picks Apples Time Limit: 2000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 2307    Accepted Submission(s): 344   Problem Description There is an ...

Character Encoding Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 1274    Accepted Submission(s): 328   Problem Description In computer s...

题目描述 给定三个二次函数 f(x)=x2+a1x+b1,g(x)=x2+a2x+b2,h(x)=x2+a3x+b3 \begin{array}{c} f(x)=x^2 +a_1x+b_1 , g(x)=x^2 +a_2x+b_2 , h(x)=x^2+a_3x+b_3 \end{array} f(x)=x2+a1​x+b1​,g(x)=x2+a2​x+b2​,h(x)=x2+a3​x+b3​​...

Piece of Cake题目题意题解 题目 Alice received a cake for her birthday! Her cake can be described by a convex polygon with n vertices. No three vertices are collinear. Alice will now choose exactly k random ve...