PmPen

摘要： 487-3279Time Limit: 2000MSMemory Limit: 65536KTotal Submissions: 151053Accepted: 25753DescriptionBusinesses like to have memorable telephone numbers（容易被记住的电话号码）. One way to make a telephone number memorable is to have it spell a memorable word or phrase. For example, you can call the University of W 阅读全文

摘要： Digital RootsTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 19968Accepted: 6563DescriptionThe digital (数字)root (根)of a positive integer is found by summing the digits of the integer. If the resulting (结果)value is a single digit then that digit is the digital root. If the resulting value co 阅读全文

摘要： Time Limit: 1000MSMemory Limit: 65536KTotal Submissions: 44052Accepted: 15768DescriptionMichael喜欢滑雪百这并不奇怪， 因为滑雪的确很刺激。可是为了获得速度，滑的区域必须向下倾斜，而且当你滑到坡底，你不得不再次走上坡或者等待升降机来载你。Michael想知道载一个区域中最长底滑坡。区域由一个二维数组给出。数组的每个数字代表点的高度。下面是一个例子 1 2 3 4 516 17 18 19 615 24 25 20 714 23 22 21 813 12 11 10 9一个人可以从某个点滑向上下... 阅读全文