Codeforces-846C - Four Segments - 枚举 + 前缀和
题目:You are given an array of n integer numbers. Let sum(l, r) be the sum of all numbers on positions from l to r non-inclusive (l-th element is counted, r-th element is not counted). For indices l ...
题目:You are given an array of n integer numbers. Let sum(l, r) be the sum of all numbers on positions from l to r non-inclusive (l-th element is counted, r-th element is not counted). For indices l ...
题目:Polycarp takes part in a math show. He is given n tasks, each consists of k subtasks, numbered 1 through k. It takes him tj minutes to solve the j-th subtask of any task. Thus, time required to ...
题目:Hideo Kojima has just quit his job at Konami. Now he is going to find a new place to work. Despite being such a well-known person, he still needs a CV to apply for a job.During all his career Hi...
题目:Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits. We will not argu...
题目:题目描述作为一只明媚的兔子,需要学会叠被子…被子是方形的,上面有很多小写字母.可以认为被子是一个n*m的字符矩阵被子能够被叠起来,当且仅当每一行,每一列都是回文串.兔子可以把同一条被子上任意两个位置的字母交换位置,而且兔子不嫌麻烦,为了把被子叠起来它愿意交换任意多次.但是兔子不能交换两条不同的被子之间的字母.现在兔子翻箱倒柜找出来了很多被子,请你帮兔子判断每条被子能否被叠起来.输入第一...