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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#19030#1877. Matryoshka DollsHSY666WA 35ms32484kbC++114.0kb2022-01-27 19:21:132022-05-06 03:37:18

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-05-06 03:37:18]
  • 评测
  • 测评结果:WA
  • 用时:35ms
  • 内存:32484kb
  • [2022-01-27 19:21:13]
  • 提交

answer

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <ctime>

using namespace std;

const int N=5e5+5;
int n,m,a[N],id[N],ql,qr;
int block,cnt,nd=1;
int tl[N],tr[N],nl[N],nr[N];
int rt,tot,rnd[N],tre[N],son[N][2],siz[N];
int sta[N<<1],cl[N<<1],cr[N<<1];
long long ans,ret[N],res;
struct A
{
	int Id,Ql,Qr;
	bool operator < (const A &x) const
	{
		return (Qr/block==x.Qr/block) ? Ql<x.Ql : Qr<x.Qr;
	}
}q[N];

int Abs (int x)
{
	return x>=0 ? x : -x;
}

void upd (int x)
{
	siz[x]=siz[son[x][0]]+siz[son[x][1]]+1;
}

int newd (int x)
{
	++tot;
	siz[tot]=1;
	tre[tot]=x;
	rnd[tot]=rand();
	return tot;
}

int merge (int x,int y)
{
	if (!x||!y)  return x^y;
	if (rnd[x]>=rnd[y])
	{
		son[x][1]=merge(son[x][1],y);
		upd(x);
		return x;
	}
	else
	{
		son[y][0]=merge(x,son[y][0]);
		upd(y);
		return y;
	}
}

void split (int x,int qv,int &p1,int &p2)
{
	if (!x)
	{
		p1=0;
		p2=0;
		return ;
	}
	if (tre[x]<=qv)
	{
		p1=x;
		split(son[x][1],qv,son[p1][1],p2);
	}
	else
	{
		p2=x;
		split(son[x][0],qv,p1,son[p2][0]);
	}
	upd(x);
}

int kth (int x,int y)
{
	if (!x)  return 0;
	if (siz[son[x][0]]+1==y)  return tre[x];
	else if (siz[son[x][0]]>=y)  return kth(son[x][0],y);
	else  return kth(son[x][1],y-siz[son[x][0]]-1);
}

void sol (int x)
{
	int p1,p2,y,z;
	for (int i=nd;i<=x;++i)
	{
		split(rt,a[i],p1,p2);
		y=kth(p1,siz[p1]);
		z=kth(p2,1);
		if (!y&&!z)
		{
			rt=merge(merge(p1,newd(a[i])),p2);
			continue;
		}
		if (!y)
		{
			ans+=Abs(i-id[z]);
			tl[id[z]]=i;
			tr[i]=id[z];
		}
		else if (!z)
		{
			ans+=Abs(i-id[y]);
			tr[id[y]]=i;
			tl[i]=id[y];
		}
		else
		{
			ans-=Abs(id[z]-id[y]);
			ans+=Abs(id[z]-i)+Abs(id[y]-i);
			tl[id[z]]=i;
			tr[i]=id[z];
			tr[id[y]]=i;
			tl[i]=id[y];
		}
		rt=merge(merge(p1,newd(a[i])),p2);
//		cout <<ans<<endl;
	}
	nd=x+1;
}

void dell (int x)
{
	int y=nl[x],z=nr[x];
	if (!y)
	{
		nl[z]=0;
		res-=Abs(x-z);
	}
	else if (!z)
	{
		nr[y]=0;
		res-=Abs(x-y);
	}
	else
	{
		nl[z]=y;
		nr[y]=z;
		res-=Abs(x-z)+Abs(x-y);
		res+=Abs(y-z);
	}
}

void delr (int x)
{
	int y=nl[x],z=nr[x];
	if (!y)
	{
		++cnt;
		sta[cnt]=z;
		cl[cnt]=nl[z];
		cr[cnt]=nr[z];
		nl[z]=0;
		res-=Abs(x-z);
	}
	else if (!z)
	{
		++cnt;
		sta[cnt]=y;
		cl[cnt]=nl[y];
		cr[cnt]=nr[y];
		nr[y]=0;
		res-=Abs(x-y);
	}
	else
	{
		++cnt;
		sta[cnt]=y;
		cl[cnt]=nl[y];
		cr[cnt]=nr[y];
		++cnt;
		sta[cnt]=z;
		cl[cnt]=nl[z];
		cr[cnt]=nr[z];
		nl[z]=y;
		nr[y]=z;
		res-=Abs(x-z)+Abs(x-y);
		res+=Abs(y-z);
	}
}

void solve1 ()
{
	for (int i=1;i<=n;++i)
	{
		scanf ("%d",&a[i]);
		id[a[i]]=i;
	}
	while (m--)
	{
		scanf ("%d%d",&ql,&qr);
		int x=0;
		ans=0;
		for (int j=n;j>=1;--j)
		{
			if (id[j]>=ql&&id[j]<=qr)
			{
				if (x)  ans+=Abs(x-id[j]);
				x=id[j];
			}
		}
		printf ("%lld\n",ans);
	}
}

void solve2 ()
{
	block=(int)sqrt(n);
	for (int i=1;i<=n;++i)
	{
		scanf ("%d",&a[i]);
		id[a[i]]=i;
	}
	for (int i=1;i<=m;++i)
	{
		scanf ("%d%d",&q[i].Ql,&q[i].Qr);
		q[i].Id=i;
	}
	sort (q+1,q+m+1);
//	for (int i=1;i<=m;++i)
//	{
//		cout <<q[i].Ql<<' '<<q[i].Qr<<endl;
//	}
	int L=1,R=block-1,X=block-1;
	for (int i=1;i<=m;++i)
	{
		ql=q[i].Ql,qr=q[i].Qr;
//		cout <<qr<<' '<<X<<endl;
		if (qr/block!=X/block)
		{
			X=min(qr/block*block+block-1,n);
			L=1;
			R=X;
			sol(R);
//			cout <<ans<<endl;
			for (int i=1;i<=R;++i)
			{
				nl[i]=tl[i];
				nr[i]=tr[i];
			}
			res=ans;
		}
		while (L<ql)  dell(L++);
		long long x=res;
		while (R>qr)  delr(R--);
		ret[q[i].Id]=res;
		while (cnt)
		{
			int y=sta[cnt];
			nl[y]=cl[cnt];
			nr[y]=cr[cnt];
			--cnt;
		}
		R=X;
		res=x;
	}
	for (int i=1;i<=m;++i)
	{
		printf ("%lld\n",ret[i]);
	}
}

int main ()
{
//	freopen ("rrads.in","r",stdin);
//	freopen ("rrads.out","w",stdout);
	srand(time(0));
	scanf ("%d%d",&n,&m);
//	if (1LL*n*m<=300000000LL)  solve1();
//	else  solve2();
	solve2();
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 2ms
memory: 30408kb

input:

5 5
1 5 2 4 3
1 5
1 4
1 3
1 2
1 1

output:

7
5
3
1
0

result:

ok 5 number(s): "7 5 3 1 0"

Test #2:

score: 0
Accepted
time: 2ms
memory: 20148kb

input:

1 1
1
1 1

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 35ms
memory: 26220kb

input:

100000 1
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 ...

output:

4999950000

result:

ok 1 number(s): "4999950000"

Test #4:

score: 0
Accepted
time: 2ms
memory: 30364kb

input:

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

output:

36

result:

ok 1 number(s): "36"

Test #5:

score: 0
Accepted
time: 2ms
memory: 32440kb

input:

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

output:

7
16
34
9
20
3
8
22
3
0

result:

ok 10 numbers

Test #6:

score: 0
Accepted
time: 3ms
memory: 32460kb

input:

20 50
7 3 13 8 9 18 1 15 12 10 20 11 17 16 2 19 5 4 6 14
3 6
5 15
11 20
10 18
9 20
3 17
13 20
16 17
3 20
4 17
15 18
5 19
3 14
8 20
2 20
1 4
15 19
16 20
5 13
14 17
4 10
6 16
8 16
1 12
4 9
11 15
4 20
8 11
3 16
7 7
3 11
3 7
4 4
5 12
6 20
3 14
6 19
6 19
2 14
2 12
5 6
4 6
8 15
10 19
4 14
1 16
1 20
2 13
3...

output:

6
48
36
24
46
74
17
1
104
64
5
68
44
58
130
5
9
8
30
7
13
48
26
38
11
8
92
5
70
0
28
9
0
20
80
44
58
58
48
36
1
2
20
28
34
76
136
46
1
28

result:

ok 50 numbers

Test #7:

score: -100
Wrong Answer
time: 0ms
memory: 32484kb

input:

20 100
4 13 20 8 1 18 19 9 17 5 12 7 11 16 6 3 15 10 14 2
4 19
1 6
6 19
4 6
2 17
1 5
11 13
1 15
9 17
9 15
7 20
3 19
10 19
1 10
11 17
10 17
2 18
17 20
12 19
1 3
5 17
7 13
6 18
10 20
1 6
2 17
5 9
4 13
11 13
2 20
7 13
12 17
5 19
17 20
11 19
3 15
3 5
5 11
1 17
10 15
16 20
1 6
2 19
4 12
5 18
9 17
3 6
12 ...

output:

76
16
57
3
84
10
3
74
31
19
59
80
40
44
16
26
94
5
26
0
54
17
53
44
16
84
8
32
3
106
17
12
68
5
30
48
2
16
102
14
9
16
98
28
64
31
6
1
54
20
26
31
74
5
26
3
66
32
36
59
1
26
6
33
35
5
57
1
1
57
24
6
10
68
36
41
34
0
12
8
11
2
62
12
41
10
5
25
0
60
0
44
25
12
8
2
16
36
8
1

result:

wrong answer 20th numbers differ - expected: '2', found: '0'