oj.uz

Submission #442640

# Submission time Handle Problem Language Result Execution time Memory
442640 2021-07-08T12:06:44 Z kig9981 Sweeping (JOI20_sweeping) C++17
100 / 100
 4296 ms 128536 KB 
#include <bits/stdc++.h>

#ifdef NON_SUBMIT
#define TEST(n) (n)
#define tout cerr
#else
#define TEST(n) ((void)0)
#define tout cin
#endif

using namespace std;

struct Splay
{
	int p, l, r, c, x, y, xl, yl;
	Splay() : p(0), l(0), r(0), c(1), x(0), y(0), xl(-1), yl(-1) {}
} tree[1500001];

const int SZ=1<<21;
vector<pair<int,int>> Q;
vector<int> x;
int mtree[2*SZ], lz[2*SZ], R[1500000];

void lazy(int c)
{
	if(tree[c].xl>-1) {
		tree[c].x=tree[c].xl;
		if(tree[c].l) tree[tree[c].l].xl=tree[c].x;
		if(tree[c].r) tree[tree[c].r].xl=tree[c].x;
		tree[c].xl=-1;
	}
	tree[c].y=max(tree[c].y,tree[c].yl);
	if(tree[c].l) tree[tree[c].l].yl=max(tree[tree[c].l].yl,tree[c].yl);
	if(tree[c].r) tree[tree[c].r].yl=max(tree[tree[c].r].yl,tree[c].yl);
	tree[c].yl=-1;
}

void update(int c) {tree[c].c=tree[tree[c].l].c+tree[tree[c].r].c+1;}

void rotate(int c)
{
	int p=tree[c].p;
	if(tree[p].l==c) {
		if(tree[c].r) tree[tree[c].r].p=p;
		tree[p].l=tree[c].r;
		tree[c].r=p;
	}
	else {
		if(tree[c].l) tree[tree[c].l].p=p;
		tree[p].r=tree[c].l;
		tree[c].l=p;
	}
	if(tree[p].p) (tree[tree[p].p].l==p ? tree[tree[p].p].l:tree[tree[p].p].r)=c;
	tree[c].p=tree[p].p;
	tree[p].p=c;
	update(p); update(c);
}

void splay(int c)
{
	while(tree[c].p) {
		int p=tree[c].p;
		if(tree[p].p) lazy(tree[p].p);
		lazy(p); lazy(c);
		if(tree[p].p) rotate((tree[tree[p].p].l==p)==(tree[p].l==c) ? p:c);
		rotate(c);
	}
	lazy(c);
}

int add_node(int c, int v)
{
	splay(c);
	for(;;) {
		lazy(c);
		if(tree[c].y<tree[v].y) {
			if(tree[c].r==0) {
				splay(c);
				if(tree[v].r=tree[c].r) tree[tree[v].r].p=v;
				tree[c].r=v;
				tree[v].p=c;
				update(v); update(c);
				return c;
			}
			c=tree[c].r;
		}
		else {
			if(tree[c].l==0) {
				splay(c);
				if(tree[v].l=tree[c].l) tree[tree[v].l].p=v;
				tree[c].l=v;
				tree[v].p=c;
				update(v); update(c);
				return c;
			}
			c=tree[c].l;
		}
	}
}

void lazy_propagation(int bit, int s, int e)
{
	mtree[bit]=max(mtree[bit],lz[bit]);
	if(s<e) {
		if(mtree[2*bit]<0x7f7f7f7f) lz[2*bit]=max(lz[2*bit],lz[bit]);
		if(mtree[2*bit+1]<0x7f7f7f7f) lz[2*bit+1]=max(lz[2*bit+1],lz[bit]);
	}
	else if(R[s]>-1) {
		tree[R[s]].yl=max(tree[R[s]].yl,lz[bit]);
		lazy(R[s]);
	}
	lz[bit]=-1;
}

void push(int n)
{
	int bit=1, s=0, e=SZ-1;
	while(s<e) {
		int m=(s+e)>>1;
		lazy_propagation(bit,s,e);
		if(n<=m) tie(bit,e)=make_pair(2*bit,m);
		else tie(bit,s)=make_pair(2*bit+1,m+1);
	}
	lazy_propagation(bit,s,e);
}

void dfs(int &c, int p)
{
	int l=tree[p].l, r=tree[p].r;
	lazy(p); tree[p].p=tree[p].l=tree[p].r=0;
	if(l) dfs(c,l);
	c=add_node(c,p);
	if(r) dfs(c,r);
}

void query(int n1, int n2, int p, int v, int bit=1, int s=0, int e=SZ-1)
{
	int m=(s+e)>>1;
	lazy_propagation(bit,s,e);
	if(n2<n1 || n2<s || e<n1 || mtree[bit]>v) return;
	if(s==e) {
		int &c=R[m];
		for(;;) {
			lazy(c);
			if(tree[c].y>v) {
				if(tree[c].l==0) {
					splay(c);
					break;
				}
				c=tree[c].l;
			}
			else {
				if(tree[c].r==0) {
					splay(c);
					if(tree[c].r) {
						for(lazy(c=tree[c].r);tree[c].l;) lazy(c=tree[c].l);
						splay(c);
					}
					break;
				}
				c=tree[c].r;
			}
		}
		mtree[SZ+p]=min(mtree[SZ+p],mtree[bit]);
		if(tree[c].y<=v) {
			mtree[bit]=0x7f7f7f7f;
			if(R[p]==-1) {
				swap(c,R[p]);
				tree[R[p]].xl=x[p];
				lazy(R[p]);
				return;
			}
			if(tree[c].c>tree[R[p]].c) swap(c,R[p]);
			dfs(R[p],c); c=-1; tree[R[p]].xl=x[p]; lazy(R[p]);
		}
		else {
			mtree[bit]=tree[c].y;
			tree[v=tree[c].l].p=0;
			tree[c].l=0; update(c);
			if(R[p]==-1) {
				R[p]=v;
				tree[R[p]].xl=x[p]; lazy(R[p]);
				return;
			}
			if(tree[v].c>tree[R[p]].c) swap(v,R[p]);
			dfs(R[p],v); tree[R[p]].xl=x[p]; lazy(R[p]);
		}
		return;
	}
	query(n1,n2,p,v,2*bit,s,m);
	query(n1,n2,p,v,2*bit+1,m+1,e);
	mtree[bit]=min(mtree[2*bit],mtree[2*bit+1]);
}

void set_tree(int n1, int n2, int v, int bit=1, int s=0, int e=SZ-1)
{
	int m=(s+e)>>1;
	lazy_propagation(bit,s,e);
	if(n2<n1 || n2<s || e<n1) return;
	if(n1<=s && e<=n2) {
		lz[bit]=v;
		lazy_propagation(bit,s,e);
		return;
	}
	set_tree(n1,n2,v,2*bit,s,m);
	set_tree(n1,n2,v,2*bit+1,m+1,e);
	mtree[bit]=min(mtree[2*bit],mtree[2*bit+1]);
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);
	TEST(freopen("input.txt","r",stdin));
	TEST(freopen("output.txt","w",stdout));
	TEST(freopen("debug.txt","w",stderr));
	int L, N, B, M;
	cin>>L>>N>>M; tree[0].c=0;
	memset(lz,-1,sizeof(lz));
	memset(R,-1,sizeof(R));
	memset(mtree,0x7f,sizeof(mtree));
	for(int i=1;i<=N;i++) {
		int a, b;
		cin>>a>>b;
		x.push_back(a);
		tree[i].x=a;
		tree[i].y=b;
	}
	Q.resize(M); B=N;
	for(auto &[t,a]: Q) {
		cin>>t>>a;
		if(t==2) x.push_back(L-a);
		else if(t==4) {
			int b;
			cin>>b;
			x.push_back(a);
			tree[++N].x=a;
			tree[a=N].y=b;
		}
	}
	sort(x.begin(),x.end()); x.resize(unique(x.begin(),x.end())-x.begin());
	for(int i=1;i<=B;i++) {
		int p=lower_bound(x.begin(),x.end(),tree[i].x)-x.begin();
		if(R[p]==-1) R[p]=i;
		else R[p]=add_node(R[p],i);
		mtree[SZ+p]=min(mtree[SZ+p],tree[i].y);
	}
	for(int i=SZ;--i;) mtree[i]=min(mtree[2*i],mtree[2*i+1]);
	for(auto[t,a]: Q) {
		int p;
		if(t==1) {
			splay(a);
			R[p=lower_bound(x.begin(),x.end(),tree[a].x)-x.begin()]=a;
			push(p);
			cout<<tree[a].x<<' '<<tree[a].y<<'\n';
		}
		else if(t==2) {
			p=lower_bound(x.begin(),x.end(),L-a)-x.begin();
			push(p); query(0,p-1,p,a);
			for(p+=SZ;p>>=1;) mtree[p]=min(max(mtree[2*p],lz[2*p]),max(mtree[2*p+1],lz[2*p+1]));
		}
		else if(t==3) {
			p=upper_bound(x.begin(),x.end(),a)-x.begin()-1;
			set_tree(0,p,L-a);
		}
		else {
			p=lower_bound(x.begin(),x.end(),tree[a].x)-x.begin();
			push(p);
			if(R[p]==-1) R[p]=a;
			else R[p]=add_node(R[p],a);
			p+=SZ;
			for(mtree[p]=min(mtree[p],tree[a].y);p>>=1;) mtree[p]=min(max(mtree[2*p],lz[2*p]),max(mtree[2*p+1],lz[2*p+1]));
		}
	}
	return 0;
}

Compilation message

sweeping.cpp: In function 'int add_node(int, int)':
sweeping.cpp:79:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   79 |     if(tree[v].r=tree[c].r) tree[tree[v].r].p=v;
      |        ~~~~~~~~~^~~~~~~~~~
sweeping.cpp:90:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   90 |     if(tree[v].l=tree[c].l) tree[tree[v].l].p=v;
      |        ~~~~~~~~~^~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 86084 KB Output is correct
2 Correct 52 ms 86104 KB Output is correct
3 Correct 50 ms 86060 KB Output is correct
4 Correct 58 ms 86136 KB Output is correct
5 Correct 62 ms 86020 KB Output is correct
6 Correct 53 ms 85968 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3230 ms 128500 KB Output is correct
2 Correct 3242 ms 128484 KB Output is correct
3 Correct 3171 ms 128536 KB Output is correct
4 Correct 2680 ms 127436 KB Output is correct
5 Correct 4296 ms 128120 KB Output is correct
6 Correct 3982 ms 128292 KB Output is correct
7 Correct 3237 ms 128500 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2484 ms 127168 KB Output is correct
2 Correct 2510 ms 126488 KB Output is correct
3 Correct 1533 ms 125384 KB Output is correct
4 Correct 1842 ms 126308 KB Output is correct
5 Correct 2500 ms 125664 KB Output is correct
6 Correct 2408 ms 126564 KB Output is correct

Subtask #4
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2484 ms 127168 KB Output is correct
2 Correct 2510 ms 126488 KB Output is correct
3 Correct 1533 ms 125384 KB Output is correct
4 Correct 1842 ms 126308 KB Output is correct
5 Correct 2500 ms 125664 KB Output is correct
6 Correct 2408 ms 126564 KB Output is correct
7 Correct 2720 ms 126696 KB Output is correct
8 Correct 2629 ms 126576 KB Output is correct
9 Correct 2697 ms 126692 KB Output is correct
10 Correct 2013 ms 125544 KB Output is correct
11 Correct 2784 ms 126500 KB Output is correct
12 Correct 3463 ms 126424 KB Output is correct
13 Correct 3990 ms 126376 KB Output is correct
14 Correct 1018 ms 99728 KB Output is correct
15 Correct 1750 ms 121712 KB Output is correct
16 Correct 2717 ms 127376 KB Output is correct
17 Correct 2483 ms 126496 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 86084 KB Output is correct
2 Correct 52 ms 86104 KB Output is correct
3 Correct 50 ms 86060 KB Output is correct
4 Correct 58 ms 86136 KB Output is correct
5 Correct 62 ms 86020 KB Output is correct
6 Correct 53 ms 85968 KB Output is correct
7 Correct 3230 ms 128500 KB Output is correct
8 Correct 3242 ms 128484 KB Output is correct
9 Correct 3171 ms 128536 KB Output is correct
10 Correct 2680 ms 127436 KB Output is correct
11 Correct 4296 ms 128120 KB Output is correct
12 Correct 3982 ms 128292 KB Output is correct
13 Correct 3237 ms 128500 KB Output is correct
14 Correct 2484 ms 127168 KB Output is correct
15 Correct 2510 ms 126488 KB Output is correct
16 Correct 1533 ms 125384 KB Output is correct
17 Correct 1842 ms 126308 KB Output is correct
18 Correct 2500 ms 125664 KB Output is correct
19 Correct 2408 ms 126564 KB Output is correct
20 Correct 2720 ms 126696 KB Output is correct
21 Correct 2629 ms 126576 KB Output is correct
22 Correct 2697 ms 126692 KB Output is correct
23 Correct 2013 ms 125544 KB Output is correct
24 Correct 2784 ms 126500 KB Output is correct
25 Correct 3463 ms 126424 KB Output is correct
26 Correct 3990 ms 126376 KB Output is correct
27 Correct 1018 ms 99728 KB Output is correct
28 Correct 1750 ms 121712 KB Output is correct
29 Correct 2717 ms 127376 KB Output is correct
30 Correct 2483 ms 126496 KB Output is correct
31 Correct 2299 ms 127852 KB Output is correct
32 Correct 2284 ms 127440 KB Output is correct
33 Correct 1888 ms 128208 KB Output is correct
34 Correct 2855 ms 127072 KB Output is correct
35 Correct 2944 ms 127308 KB Output is correct
36 Correct 2073 ms 126620 KB Output is correct
37 Correct 3215 ms 127032 KB Output is correct
38 Correct 3859 ms 128180 KB Output is correct
39 Correct 3945 ms 127624 KB Output is correct
40 Correct 2554 ms 127764 KB Output is correct