摘要： There's a beach in the first quadrant. And from time to time, there are sea waves. A wave ( xxx , yyy ) means the wave is a rectangle whose vertexes a 阅读全文

摘要： Gerg's Cake Gerg is having a party, and he has invited his friends. p of them have arrived already, but a are runninglate. To occupy his guests, he tr 阅读全文

摘要： Sum of Different Primes Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 3684 Accepted: 2252 Description A positive integer may be expressed 阅读全文

摘要： Prime Words A prime number is a number that has only two divisors: itself and the number one. Examples of primenumbers are: 1, 2, 3, 5, 17, 101 and 10 阅读全文

摘要： Less Prime Let n be an integer, 100  n  10000, nd the prime number x, x  n, so that n 􀀀 p  x is maximum,where p is an integer such that p  x  n 阅读全文

摘要： Twin Primes Twin primes are pairs of primes of the form (p; p + 2). The term \twin prime" was coined by PaulStckel (1892-1919). The rst few twin prime 阅读全文

摘要： Prime Frequency Given a string containing only alpha-numerals (0-9,A-Z and a-z) you have to count the frequency (thenumber of times the character is p 阅读全文