Over the past three years the number of people sleeping rough in Leeds has risen 75% - from 37 to 65 -according to the snapshot data, although the 2025 figure is down slightly on the 69 rough sleepers recorded in 2024.
Plus: $20/month
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* 时间O(n) 空间O(n)（理论最优，无冗余计算/存储）
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