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L．Happiness Chicken brother is very happy today, because he attained N pieces of biscuits whose tastes are A or B. These biscuits are put into a box. 阅读全文
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K．Deadline There are N bugs to be repaired and some engineers whose abilities are roughly equal. And an engineer can repair a bug per day. Each bug ha 阅读全文
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G. Sequence Number In Linear algebra, we have learned the definition of inversion number: Assuming A is a ordered set with n numbers ( n > 1 ) which a 阅读全文
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Problem D: GCD Description XiaoMingfoundthecomputetimeof XiaoMingfoundthecomputetimeof Input The first line is an positive integer T. ( The first line 阅读全文
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Problem A: Little Red Riding Hood Description Once upon a time, there was a little girl. Her name was Little Red Riding Hood. One day, her grandma was 阅读全文