QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#467905#1281. Longest Common Subsequenceyz_lyAC ✓54ms64868kbC++142.4kb2024-07-08 18:15:462024-07-08 18:15:47

Judging History

你现在查看的是最新测评结果

  • [2024-07-08 18:15:47]
  • 评测
  • 测评结果:AC
  • 用时:54ms
  • 内存:64868kb
  • [2024-07-08 18:15:46]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
inline int read(){
	int f=1,x=0;
	char ch=getchar();
	while(ch<'0'||ch>'9'){
		if(ch=='-')
			f=-f;
		ch=getchar();
	}
	while(ch>='0'&&ch<='9'){
		x=x*10+ch-'0';
		ch=getchar();
	}
	return f*x;
}
inline void work(int k){
	if(k<0){
		putchar('-');
		k=-k;
	}
	if(k>9)
		work(k/10);
	putchar(k%10+'0');
}
/*
题目是求最长上升子序列
用la[i]表示a序列中从左到右第i个1的位置,ra[i]表示a序列中从右到左第i个3的位置,suma[i]表示1~i有多少个2
lb,rb,sumb维护b数组
然后枚举i,j,答案就是i+j+min(suma[ra[j]]-suma[la[i]],sumb[rb[j]]-sumb[lb[i]]),满足ra[j]>la[i],rb[j]>lb[i]
考虑优化,枚举j,然后用双指针维护合法的i,讨论suma[ra[j]]-suma[la[i]]和sumb[rb[j]]-sumb[lb[i]]的大小关系,分别维护i-suma[la[i]]和i-sumb[lb[i]]的最大值
*/
int t,n,m,a[1000005],b[1000005],la[1000005],numla,ra[1000005],numra,suma[1000005],lb[1000005],numlb,rb[1000005],numrb,sumb[1000005],ans;
struct node{
	int val[4000005];
	int lowbit(int x){
		return x&(-x);
	}
	void change(int x,int v){
		for(int i=x;i<=2*(n+m);i+=lowbit(i)){
			val[i]=max(val[i],v);
		}
	}
	int query(int x){
		int sum=-1e9;
		for(int i=x;i;i-=lowbit(i)){
			sum=max(sum,val[i]);
		}
		return sum;
	}
}tree,tree1;
int main(){
	t=read();
	while(t--){
		n=read();
		m=read();
		ra[0]=rb[0]=la[0]=lb[0]=0;
		for(int i=1;i<=n;i++){
			a[i]=read();
			suma[i]=suma[i-1]+(a[i]==2);
			if(a[i]==1)
				la[++la[0]]=i;
		}
		for(int i=n;i;i--){
			if(a[i]==3)
				ra[++ra[0]]=i;
		}
		for(int i=0;i<=2*(n+m);i++){
			tree.val[i]=tree1.val[i]=-1e9;
		}
		numla=la[0];
		numra=ra[0];
		ra[0]=n+1;
		suma[n+1]=suma[n];
		for(int i=1;i<=m;i++){
			b[i]=read();
			sumb[i]=sumb[i-1]+(b[i]==2);
			if(b[i]==1)
				lb[++lb[0]]=i;
		}
		for(int i=m;i;i--){
			if(b[i]==3)
				rb[++rb[0]]=i;
		}
		numlb=lb[0];
		numrb=rb[0];
		rb[0]=m+1;
		sumb[m+1]=sumb[m];
		la[0]=lb[0]=0;
		int i=-1;
		ans=0;
		for(int j=min(numrb,numra);j>=0;j--){
			while(i<min(numla,numlb)&&la[i+1]<ra[j]&&lb[i+1]<rb[j]){
				i++;
				tree.change(sumb[lb[i]]-suma[la[i]]+n+m,i-suma[la[i]]);
				tree1.change(suma[la[i]]-sumb[lb[i]]+n+m,i-sumb[lb[i]]);
			}
			int val=sumb[rb[j]]-suma[ra[j]];
			ans=max(ans,tree.query(val+n+m)+j+suma[ra[j]]);
			val=-val;
			ans=max(ans,tree1.query(val+n+m)+j+sumb[rb[j]]);
		}
		work(ans);
		putchar('\n');
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 18028kb

input:

3
3 3
1 2 3
1 2 3
3 3
1 1 1
1 1 2
3 3
1 3 2
1 2 3

output:

3
2
2

result:

ok 3 tokens

Test #2:

score: 0
Accepted
time: 41ms
memory: 17948kb

input:

139889
1 10
2
2 1 2 2 3 1 1 2 3 3
7 1
3 2 3 3 1 1 2
2
6 1
2 1 3 1 1 1
1
8 7
3 1 3 3 2 2 3 1
3 2 2 1 3 3 3
10 3
3 2 1 1 2 2 1 1 1 1
3 1 1
5 2
1 2 1 3 1
1 2
1 4
1
3 3 3 3
7 2
3 1 2 1 2 2 3
3 2
6 2
3 1 1 2 1 3
1 3
1 4
1
3 1 1 3
4 2
2 3 2 3
1 3
1 8
1
1 1 3 1 3 3 3 1
4 1
1 3 3 3
1
10 10
3 1 2 1 2 2 2 2 1...

output:

1
1
1
4
2
2
0
1
2
1
1
1
1
6
1
0
1
2
2
3
4
4
1
1
1
0
2
2
3
4
4
1
1
3
2
1
2
1
3
1
1
1
3
1
1
2
3
2
1
3
1
4
1
2
2
1
3
1
1
2
3
1
2
4
4
2
2
1
1
1
2
4
3
2
1
1
2
3
1
2
2
1
5
2
4
2
1
2
3
2
5
2
1
3
1
3
1
2
1
2
2
4
3
2
0
1
1
3
2
3
2
2
0
0
2
3
1
2
0
4
1
4
1
1
3
1
1
0
1
1
1
1
3
2
2
2
3
3
3
1
2
2
3
2
1
1
3
3
2
3
...

result:

ok 139889 tokens

Test #3:

score: 0
Accepted
time: 47ms
memory: 17876kb

input:

100000
10 10
1 1 1 3 1 2 1 1 1 1
3 1 1 2 1 2 2 2 1 3
10 10
1 1 3 2 3 1 1 2 3 2
3 3 1 3 2 1 1 1 2 1
10 10
2 2 3 3 1 2 3 1 3 2
2 3 2 3 2 1 2 3 3 1
10 10
3 3 1 1 1 3 2 3 2 2
2 2 1 2 2 2 2 2 3 3
10 10
3 3 3 2 1 3 3 1 3 1
1 3 1 1 3 2 1 1 1 3
10 10
1 1 2 1 3 1 1 3 1 3
2 1 1 1 1 3 2 1 2 2
10 10
2 2 3 1 2 2...

output:

4
5
5
4
4
5
4
5
4
7
4
5
5
4
4
5
4
6
6
6
3
4
4
4
5
4
4
4
6
4
5
5
5
3
5
6
5
4
4
4
4
5
5
3
4
4
3
7
3
4
5
4
4
4
3
5
5
5
4
6
5
3
5
5
3
3
3
5
3
4
4
5
4
4
3
4
5
6
5
6
7
5
4
5
4
4
6
5
4
5
6
5
4
3
3
4
3
4
4
4
4
4
5
4
5
5
5
4
2
6
3
5
5
5
5
4
4
4
4
4
5
5
4
4
5
6
5
4
3
4
4
4
3
4
3
3
4
5
5
3
4
6
4
3
4
5
6
5
5
5
...

result:

ok 100000 tokens

Test #4:

score: 0
Accepted
time: 43ms
memory: 17944kb

input:

59509
16 16
3 3 3 2 3 3 1 3 1 2 1 1 3 1 3 2
3 3 3 1 1 3 1 1 2 2 2 2 3 3 1 1
16 17
2 1 1 1 3 1 1 2 3 3 2 1 2 3 3 3
1 1 3 1 1 1 1 1 1 3 2 3 2 1 3 1 3
19 10
1 1 3 3 2 1 1 2 3 1 2 3 3 1 3 1 2 1 1
3 1 1 3 1 1 1 2 2 1
10 14
3 3 3 1 1 3 3 1 3 1
3 1 3 2 2 3 3 1 1 3 1 3 3 3
12 20
1 1 2 2 1 1 2 1 1 2 3 1
1 1 ...

output:

6
10
7
6
8
4
6
6
7
6
6
7
5
8
8
5
8
5
8
5
5
7
6
5
5
7
6
6
8
7
5
6
6
4
7
7
6
5
7
7
7
9
5
5
8
9
7
7
6
11
8
5
7
9
6
7
8
5
5
6
6
8
8
6
9
8
4
6
7
8
7
5
8
4
5
6
8
8
5
6
6
7
7
8
5
6
7
6
7
5
10
10
6
6
8
6
6
7
5
7
5
6
6
7
3
6
10
5
6
7
7
8
7
4
4
5
7
5
7
7
6
5
6
8
6
8
6
6
7
7
8
4
4
6
7
6
5
5
6
7
8
9
6
8
7
9
8
8...

result:

ok 59509 tokens

Test #5:

score: 0
Accepted
time: 41ms
memory: 18004kb

input:

50000
20 20
1 3 3 2 1 2 1 1 1 2 3 2 1 2 2 2 2 2 1 3
3 2 2 1 3 3 1 2 3 2 1 2 2 3 2 3 1 3 2 1
20 20
1 3 2 3 2 2 1 1 1 3 3 2 2 2 3 3 3 3 3 1
2 3 2 3 1 2 1 2 2 2 1 3 1 3 1 2 3 2 3 1
20 20
1 3 1 1 2 3 1 2 2 3 3 1 2 1 1 1 2 2 1 2
2 1 1 2 2 2 1 1 1 3 1 1 3 1 2 1 2 2 3 1
20 20
3 3 3 2 1 2 2 2 1 2 2 2 2 2 3 ...

output:

8
10
11
8
7
8
9
9
9
8
7
9
9
8
8
10
8
8
10
9
8
8
8
10
9
8
9
9
8
7
5
7
8
7
9
9
9
7
10
11
12
12
8
10
11
10
9
9
10
8
8
8
9
10
8
9
9
10
9
8
8
8
10
8
9
11
9
6
9
6
9
8
8
11
9
10
9
8
8
9
10
9
9
7
9
9
9
8
9
11
6
8
8
8
8
9
9
8
9
7
8
7
6
8
10
9
9
10
8
9
8
9
11
9
8
7
8
8
10
11
6
8
9
9
8
7
9
9
10
9
7
10
8
9
9
8
...

result:

ok 50000 tokens

Test #6:

score: 0
Accepted
time: 37ms
memory: 17844kb

input:

11967
85 68
1 2 2 2 1 3 3 1 3 3 1 2 2 1 1 2 1 2 1 3 2 2 3 2 3 1 2 3 1 2 3 2 1 1 2 1 3 1 2 3 2 1 2 2 1 2 3 2 2 1 1 1 3 2 2 2 2 3 2 1 3 3 1 3 2 3 1 2 3 2 1 2 1 3 2 3 3 2 2 3 2 2 1 1 2
1 3 3 1 2 1 1 1 2 1 2 3 1 1 3 2 1 3 3 1 1 3 1 1 3 2 2 1 2 1 1 2 3 3 2 1 2 2 3 2 1 2 3 1 3 3 3 1 3 1 3 1 3 3 1 1 3 1 2 ...

output:

32
29
25
37
25
29
22
27
31
31
22
22
31
37
23
29
27
29
22
31
26
30
25
28
26
27
24
26
25
25
28
30
23
33
33
24
21
29
23
35
26
36
26
23
24
33
31
28
25
22
31
35
32
35
26
25
30
35
28
36
27
25
25
28
33
26
30
27
23
35
32
36
30
28
26
30
31
33
28
24
33
36
21
30
33
33
29
29
22
22
29
27
20
38
29
31
30
35
34
39
...

result:

ok 11967 tokens

Test #7:

score: 0
Accepted
time: 45ms
memory: 17952kb

input:

10000
100 100
2 3 2 2 2 3 2 3 1 1 2 2 2 2 1 2 3 3 3 2 3 3 1 3 3 2 2 3 1 1 3 3 2 3 1 3 3 1 2 2 2 3 1 2 3 1 2 2 3 3 1 1 3 1 3 1 2 2 2 2 2 3 2 1 3 1 2 2 1 2 1 2 1 2 3 2 3 1 3 2 2 1 2 1 2 3 1 3 2 1 3 3 2 2 1 1 3 1 1 2
3 1 1 2 1 1 1 3 3 2 3 3 3 2 1 3 3 2 2 2 1 3 1 3 1 3 1 2 2 1 1 2 3 2 3 3 2 1 3 2 3 3 3 ...

output:

38
40
34
35
39
40
38
40
39
39
36
38
42
41
39
37
42
43
35
37
36
34
39
40
41
40
33
36
38
38
42
38
40
42
44
42
35
41
35
44
39
45
36
37
39
38
40
40
35
37
39
39
40
43
42
37
41
41
39
44
43
35
40
41
37
40
39
39
36
38
40
39
38
39
37
35
40
40
41
38
36
42
41
38
38
38
34
43
37
36
40
39
41
46
38
42
40
37
47
39
...

result:

ok 10000 tokens

Test #8:

score: 0
Accepted
time: 44ms
memory: 17860kb

input:

1000
1000 1000
3 1 3 3 3 2 3 1 3 2 1 1 3 1 2 2 3 3 1 2 2 3 3 3 3 1 3 3 3 1 1 2 2 1 1 2 1 2 2 2 1 3 1 3 1 1 1 2 3 1 3 1 3 1 1 2 1 1 1 3 1 2 1 1 2 3 2 2 2 1 1 2 2 1 2 2 3 3 2 1 1 2 2 3 1 3 2 1 2 3 3 1 3 2 2 3 2 1 1 3 3 3 1 3 1 2 2 3 1 3 3 3 1 3 2 3 2 3 2 1 2 1 1 1 1 3 1 3 1 2 3 3 1 1 3 3 2 3 3 2 1 1 3...

output:

366
357
362
343
351
343
357
344
343
357
343
348
353
354
358
346
349
357
347
357
344
349
353
356
354
358
350
361
356
342
353
362
350
350
351
353
364
355
355
361
348
349
354
354
347
345
346
361
349
338
360
344
353
339
351
344
343
352
345
354
335
359
355
351
350
355
354
342
347
347
356
358
364
356
351
...

result:

ok 1000 tokens

Test #9:

score: 0
Accepted
time: 47ms
memory: 18256kb

input:

100
10000 10000
2 2 2 3 2 3 3 2 2 1 1 1 3 3 2 3 2 3 1 2 1 2 2 1 3 2 1 3 1 3 3 2 2 2 2 2 1 3 3 3 2 3 1 3 3 3 2 1 1 2 2 1 2 1 1 3 1 2 3 1 1 3 3 2 1 3 2 2 2 3 3 3 1 2 2 1 3 1 1 3 3 1 3 2 2 2 2 2 1 1 1 2 3 2 2 1 2 2 1 2 3 3 2 3 3 3 1 3 1 3 3 3 2 1 1 2 1 3 1 3 2 2 1 1 2 1 3 3 2 3 3 3 1 2 2 1 3 2 1 3 2 1 ...

output:

3431
3388
3380
3406
3403
3366
3399
3389
3390
3374
3389
3356
3419
3423
3348
3392
3366
3392
3411
3398
3436
3429
3371
3410
3414
3366
3377
3406
3384
3391
3391
3421
3400
3409
3412
3407
3429
3405
3444
3381
3414
3398
3437
3390
3381
3397
3396
3399
3412
3382
3403
3368
3393
3445
3410
3396
3393
3430
3416
3391
...

result:

ok 100 tokens

Test #10:

score: 0
Accepted
time: 47ms
memory: 24064kb

input:

10
100000 100000
3 1 2 2 1 1 1 3 2 3 1 3 3 1 2 3 1 2 3 3 3 2 3 3 3 3 2 1 1 3 3 1 1 2 3 1 2 3 1 2 2 2 3 3 2 1 1 3 3 1 2 3 3 2 3 3 3 3 1 2 1 3 1 3 3 2 2 2 3 3 3 2 1 1 2 1 3 1 3 2 3 3 3 3 2 3 1 2 2 2 2 3 2 3 1 3 3 1 3 3 1 1 3 2 1 3 1 3 3 3 3 3 2 1 1 2 2 3 1 3 2 3 3 3 2 2 3 1 3 2 1 3 1 2 3 2 2 1 3 3 2 1...

output:

33573
33651
33656
33615
33599
33519
33490
33488
33510
33572

result:

ok 10 tokens

Test #11:

score: 0
Accepted
time: 49ms
memory: 62868kb

input:

1
1000000 1000000
1 3 2 3 1 1 2 2 2 1 2 1 3 1 1 2 2 3 2 1 3 1 1 1 3 2 2 1 1 1 2 1 2 3 3 1 2 1 2 3 3 2 1 1 1 1 1 2 2 3 2 3 2 1 3 3 1 2 2 3 1 3 3 3 2 3 2 1 2 1 2 3 2 2 1 1 1 3 1 3 2 1 1 3 1 1 2 1 1 3 3 2 1 2 3 3 3 2 1 3 3 2 3 1 1 1 1 3 3 2 3 2 1 1 2 1 3 3 3 3 3 3 2 3 1 3 2 1 2 3 1 2 3 2 2 3 3 1 1 1 1 ...

output:

333799

result:

ok "333799"

Test #12:

score: 0
Accepted
time: 52ms
memory: 62092kb

input:

1
1000000 1000000
2 1 2 1 1 3 1 3 2 2 2 2 1 3 2 2 2 3 2 1 3 3 3 2 3 1 1 1 3 2 3 2 1 1 3 1 3 2 2 3 1 1 2 3 1 1 1 2 3 3 2 1 2 2 2 3 1 2 2 3 1 2 2 1 3 2 2 1 1 2 1 1 2 1 2 1 2 2 3 1 3 3 3 2 1 1 1 1 1 1 3 1 3 1 2 1 3 3 2 3 1 1 2 1 1 1 1 1 2 2 1 1 2 3 1 3 2 3 3 3 3 1 3 1 3 1 3 1 3 2 2 2 3 3 3 2 1 3 3 3 3 ...

output:

334219

result:

ok "334219"

Test #13:

score: 0
Accepted
time: 54ms
memory: 64868kb

input:

1
1000000 1000000
1 2 2 2 2 1 3 3 3 2 1 1 3 3 1 2 3 1 2 1 2 3 2 3 1 2 1 2 1 1 2 1 1 3 2 1 1 1 2 3 2 1 1 1 1 3 3 2 3 3 1 3 1 3 3 2 1 2 3 1 2 3 2 3 2 3 2 2 3 1 3 2 2 3 3 1 1 1 3 2 2 1 2 3 1 1 1 1 1 3 1 3 1 3 1 2 2 2 1 1 2 1 1 2 1 2 1 2 1 1 3 1 1 1 3 2 1 1 1 2 3 3 3 3 2 3 2 1 1 3 1 3 2 2 1 1 3 3 1 1 3 ...

output:

333870

result:

ok "333870"

Test #14:

score: 0
Accepted
time: 44ms
memory: 64832kb

input:

1
1000000 1000000
1 1 2 3 3 3 1 1 1 1 1 3 2 3 3 1 2 3 2 1 2 3 1 3 3 1 2 2 1 2 2 2 1 1 3 2 2 3 3 3 2 1 2 2 1 1 2 2 1 3 3 1 3 3 1 1 3 2 3 2 2 2 1 1 3 1 2 2 3 3 3 3 1 3 3 1 2 3 2 1 2 1 3 1 3 2 1 2 1 3 1 1 1 2 3 2 2 1 3 1 3 3 3 2 1 2 1 2 1 2 3 3 3 1 3 1 1 2 2 3 1 1 1 2 1 1 3 2 1 1 3 3 2 2 1 3 1 2 2 2 2 ...

output:

334023

result:

ok "334023"

Test #15:

score: 0
Accepted
time: 49ms
memory: 64536kb

input:

1
1000000 1000000
2 2 3 1 3 2 3 2 2 3 3 2 3 3 1 1 1 3 3 1 2 2 3 1 1 2 1 3 3 3 1 1 1 2 1 2 3 1 1 3 3 3 3 3 1 3 3 1 2 1 1 3 2 1 2 3 3 2 3 2 3 3 1 2 3 3 3 3 2 1 2 1 1 2 1 3 2 2 3 3 3 1 2 2 3 2 3 3 2 2 1 3 3 1 2 1 2 1 1 2 2 1 1 3 2 3 3 2 3 2 1 2 1 2 2 3 3 2 3 2 1 2 1 3 2 3 1 2 2 2 1 1 3 1 2 2 1 1 1 1 1 ...

output:

334141

result:

ok "334141"