A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q(formally, s1 + s2 + ... + sk = q) and the first characters of these strings are distinct. Find any beautiful sequence of strings or determine ...
Input The first line contains a positive integerk(1 ≤ k ≤ 26) — the number of strings that should be in abeautiful sequence. The second line contains stringq, consisting of lowercase Latin letters. The length of the string is within range from1 to100, inclusive. Output If su...
ou should processmqueries over a setDof strings. Each query is one of three kinds: Add a stringsto the setD. It is guaranteed that the stringswas not added before. Delete a stringsfrom the setD. It is guaranteed that the stringsis in the setD. For the given stringsfind the number o...
Add a stringsto the setD. It is guaranteed that the stringswas not added before. Delete a stringsfrom the setD. It is guaranteed that the stringsis in the setD. For the given stringsfind the number of occurrences of the strings from the setD. If some stringpfromDhas several occurrences...
A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characters of these strings are distinct. Find any beautiful sequence of strings or determine ...
The length of the line will not exceed 106. Note that you are given too large number, so you can't use standard built-in data types "float", "double" and other. Output Print the only line — the "simple exponential notation" of the given number x. Examples Input 16 Output 1.6E1 ...
The first line of each test case contains a single integer nn (1≤n≤2000)(1≤n≤2000)— the length of the strings. The second and the third lines contain strings ss and tt respectively. The sum of nn over all the test cases does not exceed 20002000. Output For each test case, ...
In the second test, there is only one object, its root is "amer", the other strings are just permutations of "amer". 题意:给n个字符串,求去重后,不同字符串的个数(不考虑字典序)。 思路:要求去重排序后,字符串的数量,这样用set去重,然后再用26大小的数组记录出现的字母,然后再读出来,计算个数...
In brief, on the contests held by Codeforces rules you write solutions to the problems that are tested during the contest on a very small number of tests. Those who have passed that set of solution tests, their authors can block (refuse to resend the solutions of this task in future even...
D. Divide and EqualizeProblem - D - Codeforces题意给定一个数字序列(长度小于 10^4 ),每次操作可以使其中一个数(小于 10^6 )除以它的因子 x ,另一个数乘 x 。是否可以通过多次操作,使序列中的数全部相等…