Alyona and Mex 题目链接: http://acm.hust.edu.cn/vjudge/contest/121333#problem/B Description Someone gave Alyona an array containing n positive integers a1, a2, ..., an. In one operation, Alyona can choose any element of the array and decrease it, i.e. re…

题意:给定一个序列,你可以对这里面的数用小于它的数来代替,最后让你求,改完后的最大的序列中缺少的最小的数. 析:这个题,读了两个多小时也没读懂,要是读懂了,肯定能做出来...没什么可说的,就是尽量凑1 2 3 4 5...如果没有了,就输出. 代码如下: #include <bits/stdc++.h> using namespace std; const int maxn = 1e5 + 5; int a[maxn]; int main(){ int n; while(cin >>…

C. Alyona and mex time limit per test: 2 seconds memory limit per test: 256 megabytes input: standard input output: standard output Alyona's mother wants to present an array of n non-negative integers to Alyona. The array should be special. Alyona is…

F. MEX Queries time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a set of integer numbers, initially it is empty. You should perform n queries. There are three different types…

构造. 比较骚的构造题.肯定可以构造出$min(R-L+1)$,只要$0$ $1$ $2$ $...$ $R-L$ $0$ $1$ $2$ $...$ $R-L$填数字即可,这样任意一段区间都包含了$0$ $1$ $2$ $...$ $R-L$. #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cmath&…

B. Alyona and Mex 题目连接: http://www.codeforces.com/contest/682/problem/B Description Someone gave Alyona an array containing n positive integers a1, a2, ..., an. In one operation, Alyona can choose any element of the array and decrease it, i.e. replac…

A. Alyona and mex 题目连接: http://codeforces.com/contest/739/problem/A Description Alyona's mother wants to present an array of n non-negative integers to Alyona. The array should be special. Alyona is a capricious girl so after she gets the array, she…

C. Alyona and mex Problem Description: Alyona's mother wants to present an array of n non-negative integers to Alyona. The array should be special. Alyona is a capricious girl so after she gets the array, she inspects m of its subarrays. Subarray is…

B. Alyona and Mex time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Someone gave Alyona an array containing n positive integers a1, a2, ..., an. In one operation, Alyona can choose any elemen…

CodeForces - 682B Input The first line of the input contains a single integer n (1 ≤ n ≤ 100 000) — the number of elements in the Alyona's array. The second line of the input contains n integers a1, a2, ..., an (1 ≤ ai ≤ 109) — the elements of the ar…