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About 900 years ago, a Chinese philosopher Sima Guang wrote a history book in which he talked about people's talent and virtue. According to his theor 阅读全文
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Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in non-increasing order, and 阅读全文
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When shipping goods with containers, we have to be careful not to pack some incompatible goods into the same container, or we might get ourselves in s 阅读全文
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"Damn Single (单身狗)" is the Chinese nickname for someone who is being single. You are supposed to find those who are alone in a big party, so they can 阅读全文
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Two integers are called "friend numbers" if they share the same sum of their digits, and the sum is their "friend ID". For example, 123 and 51 are fri 阅读全文
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On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on sc 阅读全文
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Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There were many colorful strings of b 阅读全文