oj.uz

Submission #444653

# Submission time Handle Problem Language Result Execution time Memory
444653 2021-07-14T14:09:16 Z kig9981 Sweeping (JOI20_sweeping) C++17
100 / 100
 4097 ms 122912 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, yl;
	Splay() : p(0), l(0), r(0), c(1), x(0), y(0), 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].l) tree[tree[c].l].x=tree[c].x;
	if(tree[c].r) tree[tree[c].r].x=tree[c].x;
	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]].x=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]].x=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]].x=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]].x=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:75:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   75 |     if(tree[v].r=tree[c].r) tree[tree[v].r].p=v;
      |        ~~~~~~~~~^~~~~~~~~~
sweeping.cpp:86:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   86 |     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 52 ms 80320 KB Output is correct
2 Correct 52 ms 80172 KB Output is correct
3 Correct 50 ms 80176 KB Output is correct
4 Correct 54 ms 80316 KB Output is correct
5 Correct 55 ms 80200 KB Output is correct
6 Correct 52 ms 80128 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3115 ms 122800 KB Output is correct
2 Correct 3042 ms 122808 KB Output is correct
3 Correct 3073 ms 122712 KB Output is correct
4 Correct 2508 ms 121668 KB Output is correct
5 Correct 4038 ms 122204 KB Output is correct
6 Correct 3857 ms 122356 KB Output is correct
7 Correct 3093 ms 122912 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2351 ms 121348 KB Output is correct
2 Correct 2382 ms 120772 KB Output is correct
3 Correct 1472 ms 119640 KB Output is correct
4 Correct 1800 ms 120528 KB Output is correct
5 Correct 2112 ms 119904 KB Output is correct
6 Correct 2332 ms 120704 KB Output is correct

Subtask #4
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2351 ms 121348 KB Output is correct
2 Correct 2382 ms 120772 KB Output is correct
3 Correct 1472 ms 119640 KB Output is correct
4 Correct 1800 ms 120528 KB Output is correct
5 Correct 2112 ms 119904 KB Output is correct
6 Correct 2332 ms 120704 KB Output is correct
7 Correct 2677 ms 120720 KB Output is correct
8 Correct 2730 ms 120696 KB Output is correct
9 Correct 2649 ms 120752 KB Output is correct
10 Correct 2013 ms 119728 KB Output is correct
11 Correct 2860 ms 120544 KB Output is correct
12 Correct 3575 ms 120776 KB Output is correct
13 Correct 3872 ms 120756 KB Output is correct
14 Correct 1020 ms 93868 KB Output is correct
15 Correct 1753 ms 115804 KB Output is correct
16 Correct 2772 ms 121312 KB Output is correct
17 Correct 2549 ms 120768 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 80320 KB Output is correct
2 Correct 52 ms 80172 KB Output is correct
3 Correct 50 ms 80176 KB Output is correct
4 Correct 54 ms 80316 KB Output is correct
5 Correct 55 ms 80200 KB Output is correct
6 Correct 52 ms 80128 KB Output is correct
7 Correct 3115 ms 122800 KB Output is correct
8 Correct 3042 ms 122808 KB Output is correct
9 Correct 3073 ms 122712 KB Output is correct
10 Correct 2508 ms 121668 KB Output is correct
11 Correct 4038 ms 122204 KB Output is correct
12 Correct 3857 ms 122356 KB Output is correct
13 Correct 3093 ms 122912 KB Output is correct
14 Correct 2351 ms 121348 KB Output is correct
15 Correct 2382 ms 120772 KB Output is correct
16 Correct 1472 ms 119640 KB Output is correct
17 Correct 1800 ms 120528 KB Output is correct
18 Correct 2112 ms 119904 KB Output is correct
19 Correct 2332 ms 120704 KB Output is correct
20 Correct 2677 ms 120720 KB Output is correct
21 Correct 2730 ms 120696 KB Output is correct
22 Correct 2649 ms 120752 KB Output is correct
23 Correct 2013 ms 119728 KB Output is correct
24 Correct 2860 ms 120544 KB Output is correct
25 Correct 3575 ms 120776 KB Output is correct
26 Correct 3872 ms 120756 KB Output is correct
27 Correct 1020 ms 93868 KB Output is correct
28 Correct 1753 ms 115804 KB Output is correct
29 Correct 2772 ms 121312 KB Output is correct
30 Correct 2549 ms 120768 KB Output is correct
31 Correct 2421 ms 121840 KB Output is correct
32 Correct 2500 ms 121432 KB Output is correct
33 Correct 1997 ms 122236 KB Output is correct
34 Correct 2979 ms 121180 KB Output is correct
35 Correct 3066 ms 121272 KB Output is correct
36 Correct 2108 ms 120980 KB Output is correct
37 Correct 3259 ms 121324 KB Output is correct
38 Correct 4037 ms 122180 KB Output is correct
39 Correct 4097 ms 121608 KB Output is correct
40 Correct 2689 ms 121920 KB Output is correct