146. LRU Cache
𝙻𝚁𝚄 𝙲𝚊𝚌𝚑𝚎 𝚒𝚖𝚙𝚕𝚎𝚖𝚎𝚗𝚝𝚜 𝚊 𝚏𝚒𝚡𝚎𝚍-𝚜𝚒𝚣𝚎 𝚌𝚊𝚌𝚑𝚎 𝚝𝚑𝚊𝚝 𝚛𝚎𝚖𝚘𝚟𝚎𝚜 𝚝𝚑𝚎 𝚕𝚎𝚊𝚜𝚝 𝚛𝚎𝚌𝚎𝚗𝚝𝚕𝚢 𝚞𝚜𝚎𝚍 𝚒𝚝𝚎𝚖 𝚠𝚑𝚎𝚗 𝚏𝚞𝚕𝚕. 𝙸𝚝 𝚞𝚜𝚎𝚜 𝚊 𝙷𝚊𝚜𝚑𝙼𝚊𝚙 (𝙼𝚊𝚙 𝚒𝚗 𝙹𝚂) 𝚏𝚘𝚛 𝙾(𝟷) 𝚕𝚘𝚘𝚔𝚞𝚙𝚜 𝚊𝚗𝚍 𝚊 𝙳𝚘𝚞𝚋𝚕𝚢 𝙻𝚒𝚗𝚔𝚎𝚍 𝙻𝚒𝚜𝚝 𝚝𝚘 𝚝𝚛𝚊𝚌𝚔 𝚊𝚌𝚌𝚎𝚜𝚜 𝚘𝚛𝚍𝚎𝚛 - 𝚗𝚎𝚠/𝚊𝚌𝚌𝚎𝚜𝚜𝚎𝚍 𝚒𝚝𝚎𝚖𝚜 𝚐𝚘 𝚝𝚘 𝚏𝚛𝚘𝚗𝚝 (𝚖𝚘𝚜𝚝 𝚛𝚎𝚌𝚎𝚗𝚝), 𝚛𝚎𝚖𝚘𝚟𝚊𝚕𝚜 𝚑𝚊𝚙𝚙𝚎𝚗 𝚏𝚛𝚘𝚖 𝚋𝚊𝚌𝚔 (𝚕𝚎𝚊𝚜𝚝 𝚛𝚎𝚌𝚎𝚗𝚝). 𝚃𝚑𝚎 𝚒𝚖𝚙𝚕𝚎𝚖𝚎𝚗𝚝𝚊𝚝𝚒𝚘𝚗 𝚛𝚎𝚝𝚞𝚛𝚗𝚜 𝚗𝚞𝚕𝚕 𝚏𝚘𝚛 𝚙𝚞𝚝() 𝚘𝚙𝚎𝚛𝚊𝚝𝚒𝚘𝚗𝚜 𝚊𝚗𝚍 𝚌𝚘𝚗𝚜𝚝𝚛𝚞𝚌𝚝𝚘𝚛 𝚌𝚊𝚕𝚕𝚜, 𝚠𝚑𝚒𝚕𝚎 𝚐𝚎𝚝() 𝚛𝚎𝚝𝚞𝚛𝚗𝚜 𝚝𝚑𝚎 𝚟𝚊𝚕𝚞𝚎 𝚒𝚏 𝚏𝚘𝚞𝚗𝚍 𝚘𝚛 -𝟷 𝚒𝚏 𝚗𝚘𝚝 𝚏𝚘𝚞𝚗𝚍, 𝚛𝚎𝚜𝚞𝚕𝚝𝚒𝚗𝚐 𝚒𝚗 𝚘𝚞𝚝𝚙𝚞𝚝 𝚕𝚒𝚔𝚎 [𝚗𝚞𝚕𝚕, 𝚗𝚞𝚕𝚕, 𝚗𝚞𝚕𝚕, 𝟷, 𝚗𝚞𝚕𝚕, -𝟷, 𝚗𝚞𝚕𝚕, -𝟷, 𝟹, 𝟺] 𝚏𝚘𝚛 𝚘𝚙𝚎𝚛𝚊𝚝𝚒𝚘𝚗𝚜 𝚜𝚎𝚚𝚞𝚎𝚗𝚌𝚎.
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