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QZJ123456

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Accepted problems：57 problems

7 672 784 1177 2831 3843 4666 4669 5073 6134 6553 6656 6662 6663 6664 6665 7107 7969 8218 8229 8362 8627 8672 8701 8707 8708 8709 8710 8711 8712 8728 8729 8905 8909 8919 9559 9683 9686 9737 9812 9863 9870 9879 9883 9887 9905 9906 9918 9964 10052 10053 21673 21807 21857 21858 21859 21860

Tried problems：7 problems

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