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- #include<bits/stdc++.h>
- using namespace std;
- #define ll long long
- int main()
- {
- int T=0;
- scanf("%d",&T);
- for(int t=0; t<T; t++)
- {
- int n=0,k=0;
- scanf("%d %d",&n,&k);
- ll arr[n];
- for(int i=0; i<n; i++)
- {
- scanf("%lld",&arr[i]);
- }
- for(int i=0; i<n; i++)
- {
- for(int j=i+k; j<n; j=j+k)
- {
- if(arr[i]>arr[j])
- {
- ll temp=arr[i];
- arr[i]=arr[j];
- arr[j]=temp;
- }
- }
- }
- bool bu=true;
- for(int i=0; i<n-1; i++)
- {
- if(arr[i]>arr[i+1])
- {
- bu=false;
- break;
- }
- }
- if(bu)
- printf("yes\n");
- else
- printf("no\n");
- }
- return 0;
- }
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