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Lehe

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Accepted problems：31 problems

143 217 218 329 464 602 786 787 906 956 995 996 997 999 1002 1003 1004 1261 6434 8143 8224 9205 9675 9683 9864 9989 9990 9996 9999 21403 21529

Tried problems：9 problems

249 618 619 620 1000 1005 4811 9155 9988

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