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utilforever

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Accepted problems：61 problems

170 834 947 992 1196 1197 1359 1761 1814 1818 2069 2071 2072 2073 2208 2361 2433 2447 2568 2597 2636 2711 2838 3020 3082 3163 3223 4841 4858 4859 5046 5048 5060 5353 6279 6378 6542 6549 7308 7310 7568 7584 7586 7667 7928 8187 8558 8683 8858 8884 10442 10448 10481 10541 11641 11753 12010 12342 12929 12932 15415

Tried problems：10 problems

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