CF 453B(Little Pony and Harmony Chest-数列最小加减1更改方案,满足任意2数互质-位运算dp+最坏情况分析+记忆化搜索)
B.LittlePonyandHarmonyChesttimelimitpertest4secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputPrincessTwilightwenttoCelestiaandLuna'soldcastletoresearchthechestfromtheElements