Problem Description Are you excited when you see the title “AC” ? If the answer is YES , AC it ;

Problem Description Jackson wants to know his rank in the class. The professor has posted a list of student numbers and marks. Compute Jackson’s rank in class...

Problem Description As you know, Gardon trid hard for his love-letter, and now he’s spending too much time on choosing flowers for Angel. When Gardon entere...

Problem Description Tomorrow is contest day, Are you all ready? We have been training for 45 day

Problem Description Superbowl Sunday is nearly here. In order to pass the time waiting for the half-time commercials and wardrobe malfunctions, the local hack...

Problem Description Ignatius was born in a leap year, so he want to know when he could hold his bi

Problem Description Given a positive integer N, you should output the most right digit of N^N.

Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18...

Problem Description How far can you make a stack of cards overhang a table? If you have one card,

Problem Description “Well, it seems the first problem is too easy. I will let you know how foolish you are later.” feng5166 says.