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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int n,arr[2000000],sum[2000000],maxx=-1,k;
  4. int main(){
  5.    ios::sync_with_stdio(false);
  6. 	cin.tie(0);
  7. 	cout.tie(0);
  8. 	cin>>n>>k;
  9. 	for(int i=1;i<=n;i++){
  10. 		cin>>arr[i];
  11. 		sum[i]+=arr[i]+sum[i-1];
  12. 	}
  13. 	for(int i=k;i<=n;i++){
  14. 		maxx=max(maxx,sum[i]-sum[i-k-1]);
  15. 	}
  16. 	cout<<maxx;
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 5716KB
comments (?)
stdin 
10
5
890 965 256 419 296 987 45 676 976 742
stdout 
3813
https://ideone.com/tu2wDE
language:
C++ (gcc 8.3)
created:
2 hours ago
visibility:
public

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