codeforces 980C Posterized

C. Posterized

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

Professor Ibrahim has prepared the final homework for his algorithm’s class. He asked his students to implement the Posterization Image Filter.

Their algorithm will be tested on an array of integers, where the $\mathrm{ii-th\; integer\; represents\; the\; color\; of\; the ii-th\; pixel\; in\; the\; image.\; The\; image\; is\; in\; black\; and\; white,\; therefore\; the\; color\; of\; each\; pixel\; will\; be\; an\; integer\; between\; 0\; and\; 255\; (inclusive).}$

To implement the filter, students are required to divide the black and white color range [0, 255] into groups of consecutive colors, and select one color in each group to be the group’s key. In order to preserve image details, the size of a group must not be greater than $\mathrm{kk,\; and\; each\; color\; should\; belong\; to\; exactly\; one\; group.}$

Finally, the students will replace the color of each pixel in the array with that color’s assigned group key.

To better understand the effect, here is an image of a basking turtle where the Posterization Filter was applied with increasing $\mathrm{kk to\; the\; right.}$

To make the process of checking the final answer easier, Professor Ibrahim wants students to divide the groups and assign the keys in a way that produces the lexicographically smallest possible array.

Input

The first line of input contains two integers $\mathrm{nn and kk (1\le n\le 1051\le n\le 105, 1\le k\le 2561\le k\le 256),\; the\; number\; of\; pixels\; in\; the\; image,\; and\; the\; maximum\; size\; of\; a\; group,\; respectively.}$

The second line contains $\mathrm{nn integers p1,p2,\dots ,pnp1,p2,\dots ,pn (0\le pi\le 2550\le pi\le 255),\; where pipi is\; the\; color\; of\; the ii-th\; pixel.}$

Output

Print $\mathrm{nn space-separated\; integers;\; the\; lexicographically\; smallest\; possible\; array\; that\; represents\; the\; image\; after\; applying\; the\; Posterization\; filter.}$

Examples

input

Copy

4 3
2 14 3 4

output

Copy

0 12 3 3

input

Copy

5 2
0 2 1 255 254

output

Copy

0 1 1 254 254

Note

One possible way to group colors and assign keys for the first sample:

Color $\mathrm{22 belongs\; to\; the\; group [0,2][0,2],\; with\; group\; key 00.}$

Color $\mathrm{1414 belongs\; to\; the\; group [12,14][12,14],\; with\; group\; key 1212.}$

Colors $\mathrm{33 and 44 belong\; to\; group [3,5][3,5],\; with\; group\; key 33.}$

Other groups won't affect the result so they are not listed here.

题意：给你n个数让你分组，每组最多k个数，输出最小的情况。在打重现的时候第二个样例没看懂，我一开始认为应该输出是0 1 0 254 254，但是emmm。补题的时候从后往前搜-1或相等的时候不知道哪错了wa了一发，改成从前搜之后就过了。

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define ll long long
#define pb push_back
const int N=1e5+5;
int a[N];
int b[N];
int main()
{
    int n,k;
    scanf("%d%d",&n,&k);
    memset(a,-1,sizeof(a));
    for (int i=1;i<=n;i++)
    {
        int t;
        scanf("%d",&b[i]);
        t=b[i];
        if(a[t]==-1)
        {
            int flag;
            for (int j=max(0,t-k+1);j<=t;j++)
                {
                    if(a[j]==-1||a[j]==j)
                    {
                        flag=j;
                        break;
                    }
                }
            for (int j=flag;j<=t;j++)
            {
                a[j]=flag;
            }
        }

    }
    for (int i=1;i<=n;i++)
    {
        if(i!=n)
            printf("%d ",a[b[i]]);
        else printf("%d
",a[b[i]]);
    }
    /*for (int i=0;i<=150;i++)
        {
            cout<<a[i]<<"s";
        }
        cout<<endl;*/
}