Submission #127040

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
127040	2019-07-08T20:29:48 Z	TadijaSebez	Hacker (BOI15_hac)	C++11	100 / 100	98 ms	22520 KB

hac

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=1000050;
int a[N];
ll sum[N],p[N];
int main()
{
	int n;
	scanf("%i",&n);
	for(int i=1;i<=n;i++) scanf("%i",&a[i]),a[i+n]=a[i];
	for(int i=1;i<=n*2;i++) sum[i]=sum[i-1]+a[i];
	int sz=n+1>>1;
	for(int i=1;i<=n;i++) p[i]=sum[i+sz-1]-sum[i-1];
	for(int i=n+1;i<=n*2;i++) p[i]=p[i-n];
	deque<int> dq;
	for(int i=n-sz+2;i<=n;i++)
	{
		while(dq.size() && p[dq.back()]>=p[i]) dq.pop_back();
		dq.push_back(i);
	}
	ll ans=0;
	for(int i=n+1;i<=2*n;i++)
	{
		while(dq.size() && p[dq.back()]>=p[i]) dq.pop_back();
		dq.push_back(i);
		while(dq.front()<i-sz+1) dq.pop_front();
		ans=max(ans,p[dq.front()]);
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:13:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int sz=n+1>>1;
         ~^~
hac.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
hac.cpp:11:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%i",&a[i]),a[i+n]=a[i];
                        ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	376 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	2 ms	376 KB	Output is correct
17	Correct	2 ms	380 KB	Output is correct
18	Correct	2 ms	376 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	376 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	2 ms	376 KB	Output is correct
17	Correct	2 ms	380 KB	Output is correct
18	Correct	2 ms	376 KB	Output is correct
19	Correct	2 ms	376 KB	Output is correct
20	Correct	2 ms	376 KB	Output is correct
21	Correct	2 ms	376 KB	Output is correct
22	Correct	2 ms	504 KB	Output is correct
23	Correct	3 ms	636 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	3 ms	632 KB	Output is correct
26	Correct	3 ms	632 KB	Output is correct
27	Correct	2 ms	376 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	2 ms	376 KB	Output is correct
30	Correct	3 ms	632 KB	Output is correct
31	Correct	3 ms	636 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	380 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	3 ms	632 KB	Output is correct
4	Correct	17 ms	3832 KB	Output is correct
5	Correct	37 ms	8924 KB	Output is correct
6	Correct	50 ms	11256 KB	Output is correct
7	Correct	60 ms	13388 KB	Output is correct
8	Correct	97 ms	22008 KB	Output is correct

Subtask #4

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	2 ms	376 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	2 ms	376 KB	Output is correct
9	Correct	2 ms	376 KB	Output is correct
10	Correct	2 ms	376 KB	Output is correct
11	Correct	2 ms	376 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	2 ms	376 KB	Output is correct
14	Correct	2 ms	376 KB	Output is correct
15	Correct	2 ms	376 KB	Output is correct
16	Correct	2 ms	376 KB	Output is correct
17	Correct	2 ms	380 KB	Output is correct
18	Correct	2 ms	376 KB	Output is correct
19	Correct	2 ms	376 KB	Output is correct
20	Correct	2 ms	376 KB	Output is correct
21	Correct	2 ms	376 KB	Output is correct
22	Correct	2 ms	504 KB	Output is correct
23	Correct	3 ms	636 KB	Output is correct
24	Correct	3 ms	504 KB	Output is correct
25	Correct	3 ms	632 KB	Output is correct
26	Correct	3 ms	632 KB	Output is correct
27	Correct	2 ms	376 KB	Output is correct
28	Correct	2 ms	376 KB	Output is correct
29	Correct	2 ms	376 KB	Output is correct
30	Correct	3 ms	632 KB	Output is correct
31	Correct	3 ms	636 KB	Output is correct
32	Correct	2 ms	380 KB	Output is correct
33	Correct	2 ms	376 KB	Output is correct
34	Correct	3 ms	632 KB	Output is correct
35	Correct	17 ms	3832 KB	Output is correct
36	Correct	37 ms	8924 KB	Output is correct
37	Correct	50 ms	11256 KB	Output is correct
38	Correct	60 ms	13388 KB	Output is correct
39	Correct	97 ms	22008 KB	Output is correct
40	Correct	5 ms	888 KB	Output is correct
41	Correct	5 ms	1144 KB	Output is correct
42	Correct	8 ms	1656 KB	Output is correct
43	Correct	40 ms	9080 KB	Output is correct
44	Correct	97 ms	22008 KB	Output is correct
45	Correct	20 ms	4592 KB	Output is correct
46	Correct	59 ms	13432 KB	Output is correct
47	Correct	98 ms	22136 KB	Output is correct
48	Correct	77 ms	22364 KB	Output is correct
49	Correct	80 ms	22520 KB	Output is correct
50	Correct	80 ms	22520 KB	Output is correct