Do smart contracts have memory space?

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Do smart contracts have memory space?

As fas as I know, Uniswap has pool for each pair such as 3000000 DAI 1000 ETH. Everyone can change liquidity in those pools by being liquidity provider and swaping tokens. Where is these pools' data stored on blockchain? Does contracts have memory space on blockchain? How is current pool info and owner of liqudities known? I search on internet but I can't find the answer.

submitted by /u/mjdaer
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