摘要： Problem Description we define f(A) = 1, f(a) = -1, f(B) = 2, f(b) = -2, … f(Z) = 26, f(z) = -26; Give you a letter x and a number y , you sho... 阅读全文

摘要： Problem Description There are many lamps in a line. All of them are off at first. A series of operations are carried out on these lamps. On t... 阅读全文

摘要： Problem Description Give you the width and height of the rectangle,darw it.Input Input contains a number of test cases.For each case ,there a... 阅读全文