C. Dominated Subarray Let's call an array…

B. Magic Stick Recently Petya walked in the forest and found a magic stick. Since Petya really likes numbers, the first thing he learned was spells for changing numbers. So far, he knows only two spells that can be applied to a positive integer: If t…

Let's call an array tt dominated by value vv in the next situation. At first, array tt should have at least 22 elements. Now, let's calculate number of occurrences of each number numnum in tt and define it as occ(num)occ(num). Then tt is dominated (b…

C. Array Splitting You are given a sorted array…

Educational Codeforces Round 76 (Rated for Div. 2) E. The Contest(dp+线段树) 题目链接 题意: 给定3个人互不相同的多个数字,可以把数字移动给别人,问最少移动几次后可以使第一个人的数字为1~m1,第二个人m1~m2,第三个人m2~n(可以没有数字) 题解: 设c[1][i]为第一个人m1为i时需要移动的次数,c[3][i]为m2为i是第三个人需要操作的次数,当其他两个人数字合法时,第二个人的数字也会合法.枚举第一个人的每个i,…

Educational Codeforces Round 71 (Rated for Div. 2)-E. XOR Guessing-交互题 [Problem Description] ​ 总共两次询问,每次询问给出\(100\)个不同的数,评测系统对于每次询问,随机从\(100\)个数中选择一个数\(a\),返回\(x\oplus a\).让你通过两次返回的值猜出\(x\)值是多少.要求两次询问的\(200\)个数互不相同,且题目保证\(x\)值固定不变. [Solution] ​ 题目要求所…

题:https://codeforces.com/contest/1257/problem/E 题意:给定3个数组,可行操作:每个数都可以跳到另外俩个数组中去,实行多步操作后使三个数组拼接起来形成升序. 输出最小操作次数 dp: #include<bits/stdc++.h> using namespace std; ; ]; int a[M]; ///dp[i][0]表示前i个数全属于第一个数组所要花费的最小代价 ///dp[i][1]表示前i个数全属于第一.二个数组所要花费的最小代价 //…

传送门 A. Two Rival Students 签到. Code /* * Author: heyuhhh * Created Time: 2019/11/13 22:37:26 */ #include <bits/stdc++.h> #define MP make_pair #define fi first #define se second #define sz(x) (int)(x).size() #define all(x) (x).begin(), (x).end() #defi…

E. The Contest A team of three programmers is going to play a contest. The contest consists of…

D. Yet Another Monster Killing Problem You play a computer game. In this game, you lead a party of…