Codeforces 1091D New Year and the Permutation Concatenation https://codeforces.com/contest/1091/problem/D 题目: Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For…
前言:这次比赛爆炸,比赛时各种想多,导致写到\(D\)题时思路已经乱了,肝了\(1\)个多小时都没肝出来,\(B\)题中途因为没开\(long\ long\)又被\(HACK\)了..\(C\)题因为在提交前修改的一个疏忽,\(fst\)..瞬间起飞,\(rating\)掉了\(100+\),差点回到\(pupil \quad QAQ\). A. New Year and the Christmas Ornament Description 给出\(a, b, c\)三个数,对于一个公差为\(1…
目录 Codeforces 1091 A.New Year and the Christmas Ornament B.New Year and the Treasure Geolocation C.New Year and the Sphere Transmission(思路) D.New Year and the Permutation Concatenation(思路 计数) E.New Year and the Acquaintance Estimation(Erdos–Gallai定理…
占个坑先,希望不要掉的太惨了吧,不要掉到上一次之前的rating upt:flag竟然没到,开心. A - New Year and the Christmas Ornament 好像没什么可说的. #include<cstdio> #include<cstring> #include<algorithm> #include<queue> #include<set> #include<map> #include<vector&g…
咕bye 2018,因为我这场又咕咕咕了 无谓地感慨一句:时间过得真快啊(有毒 A.New Year and the Christmas Ornament 分类讨论后等差数列求和 又在凑字数了 #include<cstdio> #include<cstring> #include<algorithm> using namespace std; int a,b,c; int main() { scanf("%d%d%d",&a,&b,&…
A. New Year and the Christmas Ornament 签到. #include <bits/stdc++.h> using namespace std; int a, b, c; int main() { while (scanf("%d%d%d", &a, &b, &c) != EOF) { , c - )); printf( + ); } ; } B. New Year and the Treasure Geolocati…
Good Bye 2018! 题目链接:https://codeforces.com/contest/1091 A. New Year and the Christmas Ornament 题意: 给出三堆数量分别为y,b,r的东西,现在要你从三堆中各选一堆,满足y'+1=b'且b'+1=r' (y',r',b'分别是指从中选取的个数). 现在问最多能拿出的个数为多少. 题解: 我是直接模拟的= =但是有更简单的方法. 让y+=2,b+=1,那么现在的最优解为min(y,b,r)*3-3.这个还…
The set [1,2,3,-,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3): "123" "132" "213" "231" "312" "3…
Given a string s, return all the palindromic permutations (without duplicates) of it. Return an empty list if no palindromic permutation could be form. For example: Given s = "aabb", return ["abba", "baab"]. Given s = "a…
Given a string, determine if a permutation of the string could form a palindrome. For example,"code" -> False, "aab" -> True, "carerac" -> True. Hint: Consider the palindromes of odd vs even length. What difference d…
The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3): "123" "132" "213" "231" "312" "3…
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). The replaceme…
You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a concatenation of each word in words exactly once and without any intervening characters. For example, giv…
The set [1,2,3,-,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3): "123" "132" "213" "231" "312" "3…
For research purpose, I've read a lot materials on permutation test issue. Here is a summary. Should be useful. Still, thanks for contributors online. P value calculation Because the actual value is one of those permutations, I would like to change t…
You are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenation of each word in L exactly once and without any intervening characters. For example, given:S: "b…
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). The replaceme…
You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a concatenation of each word in words exactly once and without any intervening characters. For example, giv…
Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). The replaceme…
B. New Year Permutation time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output User ainta has a permutation p1, p2, ..., pn. As the New Year is coming, he wants to make his permutation as pretty…
