D: 大ジャンプ - AtCoder Beginner Contest 011 | AtCoder Problem Statement: Given n: number of jumps, d: distance of each jump, find the probability to land in coordinate ( x, y ) when n jumps are made arbitrarily. We will first get rid of d…

D: 金塊ゲーム - AtCoder Beginner Contest 008 | AtCoder Let dp[ i ][ j ][ k ][ l ]: maximum score for rectangle upper left ( i, j ) lower right ( k, l ) ( taken from AtCoder Beginner Contest 008 解説 ) we can split the problem into four sub…

C: コイン - AtCoder Beginner Contest 008 | AtCoder Problem statement: Given some coins and their value, initially they are in any random permutation, all heads facing up. You will flip each coin from left to right, and every time a coin is…