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  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.13

    思考题 on trees again Tree You are given a weighted undirected tree T of N nodes. Each edge i has a weight W_i. Assume that the edges you need to travel from node i to j is E_1,E_2,E_3...E_k then we define $c_{i,j}=(-1)^k \times \sum {i=0}^kW{E_i}F……
    XGN 2019-06-29
  • 新闻

    INM CRAFT SEASON 2 STARTED!

    INM Craft is a Minecraft vanilla 1.14.2 survival server.Offline mode is enabled. If you wanna join, you can comment below! Server opens randomly 🙂
    carott 2019-06-29
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.12

    思考题for Ep.11 Lunatic Walking Orange Boy loves walking. One day, he wanna walk from (sx,sy) to (ex,ey) the boy can walk in three types: from (x,y) to (x\pm1,y) by costing A yuan from (x,y) to (x,y\pm1) by costing B yuan from (x,y) to (x+1,y+1……
    XGN 2019-06-23
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.11

    是时候放松一下,做一道简单的题目了 Walking Orange Boy loves walking. One day, he wanna walk from (x_1,y_1) to (x_n,y_n) the boy can walk in three types: from (x,y) to (x\pm1,y) by costing A yuan from (x,y) to (x,y\pm1) by costing B yuan from (x……
    XGN 2019-06-23
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.10

    思考题 from school PKU PK P Given an integer array A of length N. Define a number is strong if it is not the first or the last number in an array and it is strictly bigger than both the number before and after it. For example, in the array [2,0,1,7……
    XGN 2019-06-23
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.9

    思考题 that seems easy A perfect word Given N strings. Find out a longest string so that each substring of it is one of the N strings. Example Input str={a,t,at,orange} Output at Constriants Subtask 1(30%):N<=100 Subtask 2(30%):N<=1000 Subtas……
    XGN 2019-06-18
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.8

    思考题 for stupid myself A well-known task Given N segments [L_i,R_i] with weight W_i. Now you want to choose some segments s_1,s_2,s_3,...,s_k so that |[L_{s_1},R_{s_1}]\cap [L_{s_2},R_{s_2}]\cap ...\cap [L_{s_k},R_{s_k}]|*\sum_{i=1}^kW_{s_i} is m……
    XGN 2019-06-10
  • OBCYSIO

    Orange Boy Can You Solve It Out? Ep.7

    unsolvable 思考题 for unsolvable monkey Dragon Bone Reborn As a dragon yourself, it is very hard for you to live for every day there're a lot of knights who want to kill you and your bones are frequently broken. Your bone system can be seen as a un……
    XGN 2019-06-01