weixin_43965698的博客

SOSdp学于cf的一篇博客SOSDP以下是对他的一些理解：如cf博客中 引入一个问题：求F[x]=∑i∈xA[i]\sum\limits_{i∈x}A[i]i∈x∑​A[i]这里的i满足iii&x=iii ，即iii是xxx的子集。如F[1012101_21012​]=A[1012101_21012​]+A[1002100_21002​]+A[0012001_20012​]+A[0...

In a city there are n bus drivers. Also there are n morning bus routes and n afternoon bus routes withvarious lengths. Each driver is assigned one morning route and one evening route. For any driver,...

n sprinklers are installed in a horizontal strip of grass l meters long and w meters wide. Each sprinkler is installed at the horizontal center line of the strip. For each sprinkler we are given its p...

Our dear Sultan is visiting a country where there are n different types of coin. He wants to collectas many different types of coin as you can. Now if he wants to withdraw X amount of money from aBa...

The International Space Station contains many centrifuges in its labs. Each centrifuge will have somenumber © of chambers each of which can contain 0, 1, or 2 specimens. You are to write a programwh...

Given several segments of line (int the X axis) with coordinates [Li, Ri]. You are to choose the minimalamount of them, such they would completely cover the segment [0, M].InputThe first line is ...