北大题目代码
............\1000.txt
............\1002.txt
............\1003.txt
............\1004.txt
............\1005.txt
............\1007.txt
............\1011.txt
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............\1016.txt
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............\1079.txt
............\1080.txt
............\1087.txt
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............\1093.txt
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............\1101.txt
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............\1171.txt
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............\1186.txt
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............\1189.txt
............\1191.txt
............\1195.txt
............\1201.txt
............\1207.txt
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............\1218.txt
............\1226.txt
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............\1243.txt
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............\1256.txt
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............\1265.txt
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............\1306.txt
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............\1325.txt
............\1326.txt