计蒜客 The Preliminary Contest for ICPC Asia Nanjing 2019

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F    Greedy Sequence

You‘re given a permutation aa of length nn (1 \le n \le 10^51≤n≤105).

For each i \in [1,n]i∈[1,n], construct a sequence s_isi? by the following rules:

1. s_i[1]=isi?[1]=i;
2. The length of s_isi? is nn, and for each j \in [2, n]j∈[2,n], s_i[j] \le s_i[j-1]si?[j]≤si?[j−1];
3. First, we must choose all the possible elements of s_isi? from permutation aa. If the index of s_i[j]si?[j] in permutation aa is pos[j]pos[j], for each j \ge 2j≥2, |pos[j]-pos[j-1]|\le k∣pos[j]−pos[j−1]∣≤k (1 \le k \le 10^51≤k≤105). And for each s_isi?, every element of s_isi? must occur in aa at most once.
4. After we choose all possible elements for s_isi?, if the length of s_isi? is smaller than nn, the value of every undetermined element of s_isi? is 00;
5. For each s_isi?, we must make its weight high enough.

Consider two sequences C = [c_1, c_2, ... c_n]C=[c1?,c2?,...cn?] and D=[d_1, d_2, ..., d_n]D=[d1?,d2?,...,dn?], we say the weight of CC is higher thanthat of DD if and only if there exists an integer kk such that 1 \le k \le n1≤k≤n, c_i=d_ici?=di? for all 1 \le i < k1≤i<k, and c_k > d_kck?>dk?.

If for each i \in [1,n]i∈[1,n], c_i=d_ici?=di?, the weight of CC is equal to the weight of DD.

For each i \in [1,n]i∈[1,n], print the number of non-zero elements of s_isi? separated by a space.

It‘s guaranteed that there is only one possible answer.

Input

There are multiple test cases.

The first line contains one integer T(1 \le T \le 20)T(1≤T≤20), denoting the number of test cases.

Each test case contains two lines, the first line contains two integers nn and kk (1 \le n,k \le 10^51≤n,k≤105), the second line contains nn distinct integers a_1, a_2, ..., a_na1?,a2?,...,an? (1 \le a_i \le n1≤ai?≤n) separated by a space, which is the permutation aa.

Output

For each test case, print one line consists of nn integers |s_1|, |s_2|, ..., |s_n|∣s1?∣,∣s2?∣,...,∣sn?∣ separated by a space.

|s_i|∣si?∣ is the number of non-zero elements of sequence s_isi?.

There is no space at the end of the line.

题解 ：

输入  T组样例（T<=20）给定 n  k，   序列a是 1-n 乱序排列的一组数。

求 有n个 s序列  s_i [0]= i . 从 a中选择数字 ， s序列是降序排列 ，满足最大字典序，且s中相邻的两个数 在a中的下标 绝对值的差小于k  ∣pos[j]−pos[j−1]∣≤k  (1≤ k ≤10^5) 

输出n个s序列中非0的个数。

从 s₁ ={1,0,0,,,0}  答案为 ans=1.

s₂ 在s₁ 的基础上增加了 2 判断  新加入的2是否满足k ，即ans[2] =ans[1]+1.  从i 到 1  满足的则加上 ，否则不加。

ans[i]+=ans[j]; 每个s序列的ans[i] 需要从 1计算到 i 由 j 控制。

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <map>
#include <string>
#include <cstring>
#include <queue>
#include <stack>
#include <cmath>
#define int long long
#define Mod 1000000007
#define pi (acos(-1))
#define inf 0x3f3f3f3f3f
#define Maxn 100005
using namespace std;

int a[Maxn];
int pos[Maxn];
int ans[Maxn];
signed main(){
    int t;
    scanf("%lld",&t);
    while(t--){
        int n,k;
        scanf("%lld%lld",&n,&k);
        for(int i = 1 ; i <= n ; i  ++ )
        {
            scanf("%lld",&a[i]);
            pos[a[i]]=i;
        }
//        for(int i = 0 ; i < n ; i ++ )
//        printf("%lld ",pos[i]);
//        ans[1]=1;
//        if(pos[2]-pos[1]<=k&&pos[2]-pos[1]>=-k)
//        ans[2]+=a[1];
//        printf("a2=%lld\n",a[2]);
        for(int i = 1 ; i <= n ; i ++ )
        {
            ans[i]=1;
            for(int j = i-1 ; j >= 1 ; j -- )
            {
                if(pos[i]-pos[j]>=-k&&pos[i]-pos[j]<=k)
                {
                    ans[i]+=ans[j];
//                    printf("%lld%lld%lld\n",i,i,i);
                    break;
                }
            }
        }
        for(int i = 1 ; i < n ; i ++ )
        printf("%lld ",ans[i]);
        printf("%lld\n",ans[n]);
    } 
    return 0;
}

View Code

计蒜客 The Preliminary Contest for ICPC Asia Nanjing 2019

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原文地址：https://www.cnblogs.com/young-children/p/11456915.html