sliding window maximum sum subarray
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;
cout<<"enter the size of the array:"<<endl;
cin>>n;
int arr[n];
cout<<"Enter the elements of the array:"<<endl;
for(int i=0;i<n;i++)
{
cin>>arr[i];
}
int k;
cout<<"Enter the size of the sub array"<<endl;
cin>>k;
int i=0;
int j=0;
int max_sum=0;
int sum=0;
while(j<n)
{
sum=sum+arr[j];
if(j-i+1<k)
{
j++;
}
else if(j-i+1==k)
{
max_sum=max(sum,max_sum);
sum=sum-arr[i];
i++;
j++;
}
}
cout<<max_sum<<endl;
return 0;
}
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