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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#671995#5035. foo~DaiRuiChen00710 7ms10336kbC++17786b2024-10-24 15:15:382024-10-24 15:15:39

Judging History

你现在查看的是最新测评结果

  • [2024-10-24 15:15:39]
  • 评测
  • 测评结果:10
  • 用时:7ms
  • 内存:10336kb
  • [2024-10-24 15:15:38]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int MAXN=6e5+5,inf=1e9;
int n,k,a[MAXN],ans=0,f[MAXN],g[MAXN];
int w(int l,int r) {
	int z=0,s=0,t=0;
	for(int i=l;i<=r;++i) if(a[i]>z) z=a[i],++s;
	z=0;
	for(int i=r;i>=l;--i) if(a[i]>z) z=a[i],++t;
	return max(s,t);
}
void DP() {
	memset(f,-0x3f,sizeof(f)),f[0]=0;
	for(int x=1;x<=k;++x) {
		memset(g,-0x3f,sizeof(g));
		for(int i=x;i<=n;++i) {
			for(int j=0;j<i;++j) {
				g[i]=max(g[i],f[j]+w(j+1,i));
			}
		}
		memcpy(f,g,sizeof(f));
	}
	ans=max(ans,*max_element(f+k,f+n+1));
}
signed main() {
	scanf("%d%d",&n,&k);
	for(int i=1;i<=n;++i) scanf("%d",&a[i]);
	int t=find(a+1,a+n+1,n)-a;
	rotate(a+1,a+t,a+n+1),DP();
	rotate(a+1,a+2,a+n+1),reverse(a+1,a+n+1),DP();
	printf("%d\n",ans);
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 5ms
memory: 9240kb

input:

23 6
16 20 22 4 21 10 3 7 5 8 15 12 9 1 6 17 23 13 11 19 18 14 2

output:

20

result:

ok "20"

Test #2:

score: 10
Accepted
time: 5ms
memory: 10068kb

input:

13 6
13 9 3 4 12 6 5 1 8 10 11 7 2

output:

13

result:

ok "13"

Test #3:

score: 10
Accepted
time: 3ms
memory: 10060kb

input:

25 3
25 2 3 19 5 6 7 11 8 10 9 20 4 14 21 1 17 12 13 18 15 22 23 16 24

output:

16

result:

ok "16"

Test #4:

score: 10
Accepted
time: 7ms
memory: 8536kb

input:

25 9
1 11 10 23 9 24 7 8 19 3 5 21 18 12 15 16 17 13 2 20 14 22 4 6 25

output:

23

result:

ok "23"

Test #5:

score: 10
Accepted
time: 3ms
memory: 9144kb

input:

13 2
1 4 2 3 5 6 7 8 9 10 12 11 13

output:

12

result:

ok "12"

Test #6:

score: 10
Accepted
time: 0ms
memory: 8992kb

input:

17 5
4 2 3 6 5 1 7 8 13 16 11 12 9 14 15 10 17

output:

15

result:

ok "15"

Test #7:

score: 10
Accepted
time: 0ms
memory: 8584kb

input:

8 2
1 2 5 6 3 4 7 8

output:

8

result:

ok "8"

Test #8:

score: 10
Accepted
time: 4ms
memory: 9076kb

input:

11 5
3 11 2 10 6 5 1 4 8 7 9

output:

11

result:

ok "11"

Test #9:

score: 10
Accepted
time: 2ms
memory: 9948kb

input:

10 1
5 3 4 1 10 8 9 6 7 2

output:

6

result:

ok "6"

Test #10:

score: 10
Accepted
time: 0ms
memory: 9700kb

input:

16 2
15 12 14 9 11 13 1 3 10 8 5 2 16 4 6 7

output:

9

result:

ok "9"

Test #11:

score: 10
Accepted
time: 3ms
memory: 8628kb

input:

6 3
4 1 5 6 2 3

output:

6

result:

ok "6"

Test #12:

score: 10
Accepted
time: 2ms
memory: 8556kb

input:

1 1
1

output:

1

result:

ok "1"

Test #13:

score: 10
Accepted
time: 4ms
memory: 8608kb

input:

16 5
7 14 13 16 10 1 9 11 3 8 2 4 5 15 12 6

output:

14

result:

ok "14"

Test #14:

score: 10
Accepted
time: 3ms
memory: 9704kb

input:

10 3
10 1 7 2 8 6 9 5 4 3

output:

9

result:

ok "9"

Test #15:

score: 10
Accepted
time: 3ms
memory: 9456kb

input:

23 9
12 11 22 2 5 9 1 4 18 19 17 16 23 20 6 13 8 21 10 7 14 15 3

output:

23

result:

ok "23"

Test #16:

score: 10
Accepted
time: 0ms
memory: 10336kb

input:

15 4
4 3 8 13 12 1 14 9 15 10 7 11 2 6 5

output:

13

result:

ok "13"

Test #17:

score: 10
Accepted
time: 5ms
memory: 10052kb

input:

24 7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

output:

24

result:

ok "24"

Test #18:

score: 10
Accepted
time: 0ms
memory: 9604kb

input:

4 2
1 2 3 4

output:

4

result:

ok "4"

Test #19:

score: 10
Accepted
time: 2ms
memory: 9132kb

input:

18 1
1 3 5 7 9 11 13 15 17 18 16 14 12 10 8 6 4 2

output:

10

result:

ok "10"

Test #20:

score: 10
Accepted
time: 3ms
memory: 9916kb

input:

18 2
1 3 5 7 9 11 13 15 17 18 16 14 12 10 8 6 4 2

output:

18

result:

ok "18"

Subtask #2:

score: 0
Time Limit Exceeded

Test #21:

score: 0
Time Limit Exceeded

input:

93943 1
87243 48984 50611 19218 77699 25025 85769 28141 13380 34875 42459 66419 53472 4367 48292 16894 92171 87263 42527 67085 30687 29235 27515 81053 31421 34864 83591 70491 75344 7026 50250 63402 26773 5330 36308 76399 80032 15501 16205 71750 73964 67876 68901 70548 2043 79979 89479 19784 38838 44...

output:


result:


Subtask #3:

score: 0
Time Limit Exceeded

Test #36:

score: 0
Time Limit Exceeded

input:

1992 25
144 612 1315 1966 1779 1773 1529 625 36 1849 1783 1441 1388 1558 1258 724 137 397 542 353 1162 1213 406 792 1317 882 994 298 1864 1969 103 449 508 1501 89 1721 195 778 657 222 1152 1780 613 743 1206 694 829 142 69 1973 1465 1343 655 1540 155 146 350 491 759 1695 1082 1357 1329 1745 232 1850 ...

output:


result:


Subtask #4:

score: 0
Skipped

Dependency #1:

100%
Accepted

Dependency #3:

0%

Subtask #5:

score: 0
Skipped

Dependency #4:

0%

Subtask #6:

score: 0
Skipped

Dependency #2:

0%