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 occurrence
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...
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 insyou should count all of them. Note that you should solve the problem inonline ...
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 ...
You should process m queries over a set D of strings. Each query is one of three kinds: Add a string s to the set D. It is guaranteed that the string s was not added before. Delete a string s from the set D. It is guaranteed that the string s is in the set D. For the ...
URL:http://codeforces.com/contest/722/problem/C 代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #include<bits/stdc++.h> #define ll long long #define N 100005 using namespace std; int n; ll s[N]; set< pair<int,int> > seg; multiset<ll> sum; void erase(int p){ set< ...
A substring of s is a non-empty string x = s[a... b] = sasa + 1... sb (1 ≤ a ≤ b ≤ |s|). For example, "code" and "force" are substrings of "codeforces", while "coders" is not. A subsequence of s is a non-empty string y = s...
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 ...
Each of the nextmlines contains two integerslandr(1 ≤ l ≤ r), followed by a characterc, which is a small or large English letter or a digit. This line describes one operation. It is guaranteed thatrdoesn't exceed the length of the stringsbefore current operation. ...
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...