Maximum Of K- size subarrays (Deque)

 Problem:-

Given an array A of size ‘N’ and an integer k, find the maximum for each and every contiguous subarray of size k.

Input :

  • First line contains 2 space separated integers ‘N’ and ‘k’ .
  • Second line contains ‘N’ space separated integers denoting array elements.

Output:

  • Space separated Maximum of all contiguous sub arrays of size k.

Constraints :

  • 1<= N <=10^5
  • 1<= Ai <=10^9
  • 1<= k <=N
SAMPLE INPUT
 
9 3
1 2 3 1 4 5 2 3 6
SAMPLE OUTPUT
 
3 3 4 5 5 5 6
Explanation

First Sub array of size 3 : 1 2 3, here maximum element is 3

second Sub array of size 3 : 2 3 1, here maximum element is 3

third Sub array of size 3 : 3 1 4, here maximum element is 4

fourth Sub array of size 3 : 1 4 5, here maximum element is 5

Fifth Sub array of size 3 : 4 5 2, here maximum element is 5

Sixth Sub array of size 3 : 5 2 3, here maximum element is 5

Seventh Sub array of size 3 : 2 3 6, here maximum element is 6

Time Limit:1.0 sec(s) for each input file.
Memory Limit:256 MB
Source Limit:1024 KB

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Code:-

#include<stdio.h>
int main()
{
    long int n,k;
    scanf(“%ld%ld”,&n,&k);
    long long int a[n],i,j,max;
    for(i=0;i<n;i++)
     scanf(“%lld”,&a[i]);
    for(i=0;i<=nk;i++)
    {
        max=0;
        for(j=i;j<i+k;j++)
        {
if(max<a[j])
         max=a[j];
        }
        printf(“%lld “,max);
    }
    return 0;
}



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